1. talk with everyone you know, even if you think they don't sympathize, about the visit and your reasons to protest. most importantly, secure their agreement to participate. this is a basic psychological strategy of prior committment; it helps enormously when those wavering between coming and not coming have to make their decision.
2. make up a phone tree or a list of names, phone numbers, and emails of people you know that may go. call all of them RIGHT NOW, TODAY (see #1), call all of them the day before (what we know right now is august 22nd at the hilton). if you can get just 5 names, and have each of those people get 5 names, and on and on, this protest will easily, easily reach the thousands.
3. make up a poster or download the one on the site and staple, post, hand out, or otherwise distribute to everyone. coffee shops, head shops, grocery stores, hippie streets, homeless shelters, street kids. direct them all to the indymedia site or some other sympathetic group of your choice for updates.
the fact is that most people willing to protest are not aware of indymedia, or pprc, or planning meetings, or whatever. live bodies are the most important thing, so get the word out.
oh, i almost forgot, of extra importance...
4. BIG, BOUNCY BALLS with peace signs all over them. one peace sign is easier to read and clearer to the public than 5,000 signs extolling the virtues of a socialist market. brign lots and lots, trunkfulls of big bouncy balls with peace signs. they make nice diversionary weapons. also, mirrors are great for reflecting the hot august sun into the eyes of the stormtroopers. but don't forget to draw peace signs on the back of the mirrors!!!