555 Timer googled on the internet will turn you up about 672,000 results. Of course, each website probably has a bunch of schematics. That will turn out to be a few million results.
I've decided to post some projects about the 555 that I find are really fun and useful/ annoying. www.555-timer-circuits.com has more.
It is overwhelming about where to start...
Step 1: Gather the Parts.
You will need:
A lot of 555 timers
A lot of jumpers
A lot of electronic components