Today I used Kapton (okay, Koptan) tape for one of its common purposes for the first time, I used it to stop insulation melting and disappearing while I was tinning leads. I got the leads out of an old parallel cable, and they probably weren't meant to be soldered at all. Old computer cables are bar none the cheapest source of highly multi-colored, small-gauge finely-stranded wire I know of. If you pick them up from thrift store warehouses or flea markets you can get them for less than a dollar, and get yourself a meter of 20+ different colors of wire.
About this time last year, I built myself a SK450 quadcopter to cheaply familiarize myself with the hobby and gain a fun new toy. That project came off very well, and I was pleased with the results for the money spent. This time, I'm upgrading that copter into a "dead cat" configuration, using some new parts and some old ones — but mostly new.