Slogans like: "The Constitution or Socialism?"; "Liberty or FEDGOV Control?"; "What Did Our Founders Die For?"; "Marxism (or socialism) Has NEVER Worked"; "I Own My Healthcare"; "Congress Critters Live For Re-Election"...etc.
Always make it short and to the point. It's called "talking points" which is part of the liberal/socialist Alinsky play book.
Good ideas. Yes, short slogans are VERY important for passing motorcades, a little less so for tea parties, but irrelevant for town halls. Especially if you’re front row, the congress critter and his staff have time to read a darn ESSAY if it’s on a poster big enough. And sometimes you just HAVE TO intimidate them with the fact that REASON AND SCHOLARSHIP ARE ON YOUR SIDE (and yes it DOES help to weaken their resolve; I promise you).