There are a million answers, and all depend on what YOU want to do with your Jeep...
A few of these things I've been looking into myself, so I'll just give you some VERY general ideas here to start with...
1) Steering: Plenty of good posts on here for this topic... In short if you want power steering, find one from a S-10: column and power steering box will have close to the same factory ratio... Camero's work, but they have a much longer ratio (i think). As far as the upgrade itself, search "Power steering upgrade" on forum search, i think you'll be pleased with the info you find.
2) I've been looking into disc front drum rear. Plenty of sites selling kits, but cheaper to try to find a Jeep wrecker (J&W by me in Cal, you not sure? ) and find one that had the set-up already, then you buy the new parts like a disc and pads etc... Again though the brakes you have can be rebuilt with new parts, calipers, pads etc and these are so light that drum will "work" I plan on towing and long down / up grades in mountains, so I'm going to disc for pure peace of mind... Someone might know of some better doner vehicles here too...
3) Painless wiring kits. You can find these at quadratec, summit, etc online. Or if your comfortable, like me, with spending countless hours re-wiring and running through heat shield / conduit, go for it
Those painless kits look pretty awesome though...
4) Lifts are a big deal. Again what do you want it for? Looks? Clearance? etc... Also what tires are you planning to run (Size) If 33's a 2-1/2" lift and 1" body lift (maybe a 1"
Transmission -drop to help drive shaft angles) may work out good, but you still might have to adjust angles of drivelines and even replace them? 4" er's for sure mod required... Stay away from huge body lifts and shackle lifts, as these tend to be "dangerous" in the way of handling...
All in all Sasquach was right above: Do a little research, fill out your profile info for your vehicle, then split these into individual topics in their thread locations... For instance, the lift portion in this: suspension and steering" category, etc.. You'll be supprised how much info you'll get that way, and how helpful and knowledgeable these folks here are...
I was...
Cheers Man,
~ JR