Drunvolo Melchisedek "The Flower of Life" Is a good one, there is some great Sacred Geometry in it, also some channeling stuff to wade through, not really my thing, but Great Stuff on Sacred Geometry.

If you are into Cards, like tarot, there is a great Sacred Geometry Deck.
www.aeclectic.net/tarot/car...etry-hart/

There is tons of stuff on the net as well, just google it you will find a wealth of knowledge.

Buy yourself a basic school geometry set and you will have everything you need to get started.

Love and Geometric Design
Yishai

I drew the flower of life while reading The Ancient Secret FOL books, they're a great read...It was a great meditative exercise and I highly recommend it!

Definitely the Compass, they sell a big compass at lumber stores, but also get some books at the library.
Check out how Gaudi made Cantenary arches. Chains! Get a nice drafting table with a Paralell bar!
Remember, you can't divide a line into three equal parts with a compass, you need to start to think in weird divisors, and angles.
Get a book at the library about Buckminster Fuller.
Get string, chains, hooks, sticks, bamboo,.....
Use a stick and string to figure out how tall a building is, Triangulating and using the SinCosTan formula.
The geometry part of it starts to talk to you if you don't make it into work.
SPIROGRAPH!!