Duh! tracker won't start

Have a 1992 geo tracker, started perfect for a year. today it started and died. now it turns over but doesn't fire! yes it has gas in it...lol. don't even know where to start looking for the problem! any ideas? :banghead:

check and make sure you are getting fuel and spark , start at the spark plugs and see if the are firing if not work your way back , check and see if you are getting fuel in the throttle body , just check everything and just don't start replacing parts , if you still can't figure out take it to a shop , in the long run it can be alot cheaper