cold air intake, with large diameter tubing (if you do this, watch out for water!)
smaller tires or higher PSI.
bore out your throttle body, or clean it up, or both.
get an adjustable fuel pressure regulator.
fuel system cleanup (from a mechanic, dont just get the additives)
KEEP your fuel system clean by using sea foam every fill up, or lucas fuel cleaners. lucas is highly recommended by my mechanic.
not sure on this one but i believe new spark plugs will help a bit, get platinum 4's
im working on getting those now.
lighten up the jeep! if looks are not an issue with you, take all kinds of useless stuff out of it that adds weight.
theres all kinds of things you can do, most of them are cheap.