Cricut Spatula
Tweezers
Metric allen hex set
Digital Calipers

And possible a dial gauge.

Alot of great info can be found over on solidoodletips as well.

Yes, the squiggle part is the the raft and it is generated by the slicing software it is made to help the first layer of ABS or whatever your printing with stick to the platform/bed it sounds simple but getting hot plastic to stick to something can be tricky
there are some posts about using glass here on the forum, just do a search with 'glass bed' and you will find quite a few informative posts on the how and why of using it.

Glass bed is when you add a sheet of glass to the top of the heated or unheated aluminum build platform.  Main purpose is to enable faster switching between prints so you don't have to wait for the bed to cool off and reheat to start your next print.  Added benefits are it can provide a flatter surface if you have a warped aluminum bed, and coated with hairspray many find that it's a superior sticking surface than aluminum and kapton (orange tape) that comes with the SD2.  The better the stick the less warp and curl you'll get. 

Also important is to enclose the build environment to keep a more constant temp to combat warping and curling. 

Hit up the search box and wiki.solidoodle.com for lots of information.