Essential Maintence Tools

I recently bought a 1993 ZZR600 and am planning on doing most of the maintenance in it myself (pretty well anything apart from rebuilding the engine/transmission). I am wondering what people deem to be the essential tools/measuring equipment/calibration equipment to have to perform maintenance a motorcycle (not just a ZZR600) and the best places to buy said tools either online or in a store.

viewtopic.php?f=8&t=26036&hilit=tools+no+not

the sample pages on this
http://www.amazon.com/Essential-Guide-M ... 1884313418
on amazon give a list of tools. book's Ok if you are a mechanical numpty like me.

Thanks guys. I now have a small shopping list of stuff I need to sneek past the wife.