I was halfway through writing up my own general guide and tips for this, is much the same way as my sign How To, when I came across a much better write-up, and adapted/added to it to suit our purposes. Enjoy.

Getting information into peoples' hands is one of the most effective things we can do to starve Scientology of new recruits and their money. No matter how much of a lulzfag you are online or even at the protests, it's worthwhile knowing the basics of how to flyer well as part of the elaborate troll that is pretending to care.

Choosing the Right Materials

Know where you will be going ahead of time, and figure out the audience you will be speaking to; what works on mums at the playground probably won't be as effective for high school kids. Leaflets that you intend to hand to people should ALWAYS be A5 or A6 size. Full sheet flyers are best used for posting on bus stops, telephone poles, and bulletin boards. If you are flyering a specific Scientology event, try to obtain materials specific to that event.

Materials should always have a general link (For example, to WWP, or exscientologykids) related to the topic at hand and a second link for people to contact us here on Brumanon. Failing this, have a pen on hand to write contact details down for anyone who's looking for more information. Images and fonts should balance being eye-catching and being legible.

The Pitch

When walking by people, you have about 2 seconds to tell them why they should take your materials. Don't stress out about getting anything useful into that time, just focus on getting their attention. "Information, ma'am/sir?" is a perfect short pitch. People will see the spectacle of us in our maks, and those who are interested will take a flyer

When standing still, you have a little bit more time. It's also possible to engage in carnival style barking, i.e. "Come to us, take a leaflet from us, find out why we're protesting Scientology!" Keeping your pitch as general as possible helps cut down on people assuming you are supporting Scientology.

When at a specific event, offer information about that event, such as "Information about the exhibit" when flyering CCHR. In these cases, it doesn't matter so much if people think you're advertising for the Scientologists; if they ignore your information about the event, they'll ignore the Scientologists' as well.

Draw on whatever skills you have available. If you've worked retail, you already know how to make a sales pitch. If you've worked phones, you already know how to keep people interested enough to keep listening. If you've done political work or other flyering projects, you're probably already an expert in the field. Don't think that because we're promoting something different your old skills won't apply.

The Refusal

More than half of the people that you pitch to will turn you down. This is an optimistic statistic I just pulled out of my ass. Dealing with a refusal is nearly as important as the initial pitch, as you've usually got someone new right on the heels of the person turning you down. Always be polite and don't force the issue. "Have a nice day sir/ma'am" is short enough that they'll probably hear it.

The reason this is so important is twofold. First, the person refusing is going to have a less negative opinion of the person who is polite than the one who keeps pushing after they've said no. We are engaged in, among other things, a public relations war. Keeping the public firmly on our side is vital to maintaining the pressure on the cult. Second, the next person coming up is going to be more receptive to your pitch, as they see that you are not going to hard sell them anything. Pity is your friend, even if you don't have any of it yourself.

Follow Up

If someone stops long enough to take your flyer, you have a bit more time to explain what you're doing and how they can help, or at least keep themselves out of harm's way. Offering to answer questions is a great option if you're stationary, otherwise pointing out how people can get in touch with you or do research on their own is a better bet. When engaged in conversation with someone who has taken your materials, try to make sure that you have another anon nearby handing out flyers while you're talking, so that you don't miss any opportunities to hand out information without sacrificing the important work of actually talking to the public.

You may want to tell people who are very receptive to the message about the local schedule. Even if they don't choose to mask up, having more people aware of when planned events are going to happen is never a bad thing. You can also give them your anonymous contact info or your local group's website or email.

If you don't know the answer to something, don't pretend to. Explain why you don't have that information (I mostly follow this thing, I've only been doing this for a week...) and either direct them to someone in your group who can answer or to a website that will have the right information.

Other Issues

Flyering in pairs or small groups is always preferable to flyering alone. Have a camera rolling in case your small group is targeted by bullbaiters or you have some really interesting conversations with the public that should be shared. Seeing what works and what doesn't helps every anon.

Tits are always relevant. Whether you like it or not, women are seen as "less of a threat" than men and are more likely to get results. Get your tits near the front of the group and have them do a lot of the talking.

Spectacle can be your friend. Signs, masks and wacky costumes can drum up public interest and make people more inclined to take your information. It can also be your enemy if hideously overdone. Try to keep music to a volume where people can be heard over it (whether that means turning it down or keeping it ahead of your flyering group) and don't invade anyone's personal space.

IF SOMEONE LOOKS UNCOMFORTABLE, LET THEM LEAVE. Never box in a member of the public or a Scientologist; it's intimidating and in some cases could be illegal. You're free to try and reason with them briefly, but never make someone feel like they're being forced to talk to you.

Lots of good ideas here.

Another thought that is often discussed is really not to worry about being refused / ignored / vaguely insulted by public. If they won't take a flyer from a stranger they probably won't go off with a stranger for a 'stress test' either.
Not sure how our female protestors would feel about being referred to as 'tits' though.

We have female protesters?

Shocking, I know.