Good screwdrivers, a set of specialty screwdrivers w/torx male tips, torque wrenches 1/4", 3/8" and 1/2", an impact driver in either 3/8" or 1/2", some adapters going each-way (1/4-3/8; 3/8-1/2") some extensions in your drive sizes, a good ball pein hammer & a baby sledge, or a bigger ball pein, and some cold chisels and punches; and my favorites, some straight-jaw Vise-Grips (10" size I find to be most-used) and a Dremel tool w/their ~$20 dispenser pack of heavy-duty cutoff blades (don't fall for the quick-release ones, that's just an excuse to charge more $ for the same thing) and a bunch of different bits.
The Dremel tool and its bits are something which can get you out of so-many situations. Slotting a rounded-off fastener so you can release it w/a good-fitting screwdriver, I've even made Phillips-style cuts, but usually a tight-fitting slot head cut will release it.
A BernzoMatic torch in either propane or MAPP gas. Used for those thorny problems like brake disc buttons before you bugger the heads. Heat and an impact driver will release nearly anything, and the cold chisel for when it won't, before the last-resort of the drill press/hand drill, a new bit and/or an e-z out.
A Mity-Vac for fluids, and a 60 ml syringe w/a short length of 1/4" I.D. clear plastic line on it to reverse-bleed your clutch from the slave master cyl. bleeder valve. Some metric flare-nut wrenches.
Harbor Freight Tools is OK to get your stuff at, they are very cost-conscious. Pro guys get Snap-On or MAC. I have a mix of stuff, and for my uses, I usually hit Sears Craftsman sales, but I have all of the above in some form.
That's a good start. One self-repair often pays for the tool.
And a shop manual of-course and a computer to get onto here and ask for help.
