Spark plugs - NGK or Denso, whatever is easier to get and cheaper.. so mainly NGK.
Wires - OEM i would call the best, so those or NGK if you have the money, otherwise whatever has a lifetime warraty..
Cap and Rotor - Denso or best OEM equivalent.
Oil - I like Valvoline oil. I run conventional Valvoline, 10w40 in my justy.
Coolant - I prefer Prestone, but Peak is good too.
Battery - Optima is my fav, but spendy.. otherwise anything made by Johnson Controls (interstate, die hard, duralast, kirkland, alot of OEM, and some of the higher end generics)
Oil Filter - Have heard good things about the reusable k&n oil filters, but never used one myself.. I like Wix filters though, if you can't find the name brand, the napa brand are wix..
Air Filter - I like k&n, otherwise whatever is cheapest cuz i change them out pretty often.. cant find a k&n for my justy though, no biggie, keeping mine stock anyways.. but I'd probably still buy one if i could find it.. haha
Tires - I've had good experience with Toyo
Suspension - OEM or bilstien (don't even know if they make em for justys though)
Brakes - OEM or ceramic.. EBC brakes are good. (again, not sure if they have any that fit justys.)
Headlights and lights - Sylvania silverstar plus headlights.. I prefer the plain white color over the purple or blue headlight bulbs.. I've used all and although many may think the blue or purple look brighter when you are looking at the car, when you are driving with them, you really notice how much dimmer they are. I will also spend the extra couple cents it costs to get the sylvania long life bulbs for blinkers and everything else.