get a girlfriend that works in the local halfrauds... or as i have done, get a girlfriend and a sister to work there! trade and staff discount... amaaazing!
another thing to buy is some engine cleaner, so when you have the bits off, give them a clean as you go along...and some carb cleaner...oh oh oh! and some kitchen roll...infact, Sh*t loads of kitchen roll... and if you have a garage, and dont already have a work surface, build one!
but, imo, the best thing to do, once you have all the tools... is keep them all organised! make sure everything has its place, buy storage equipment, and kepp it neat, at the end of every little tinker, have a tidy around! nothing like getting half way through a job, and not being able to find the 12mm spanner!