Don't run up to red lights - no need to hurry to a stop anyhow. Coast down.
Drive a consistent speed on the freeways - no darting up and back. Let everyone else waste gas.
Try to cruise - as much as possible - in the tach range of 2300-3000rpm (for the 4.0.) This is the "peak torque" range of the engine, where you have peak VE, and peak fuel efficiency. I "found" an additional 3-4 miles per gallon on the freeway when I quit using 5th gear until I hit 85-90 or so (88/BA-10/231/D35/D30/3.07)
Try to not travel (as much as possible) during peak drive time. If you don't catch the lights, you'll spend a lot more time waiting on them, getting ZERO mpg.
On that note, learn the timing of the lights you have to deal with. If you can catch them while they're green, you'll come out ahead.
Don't stand on it to catch a light - you'll waste more gas than if you'd just idled behind the thing (and you won't endanger anyone else. I'll use extra fuel rather than risk killing someone else. No matter what the attorneys and insurance companies thing, you can't put a dollar value on a human life. Granted, some are worth nothing to begin with...)
5-90