look for your battery under the hood and wiggle the battery cables. if loose, tighten them and try again. If it doesn't start, turn the key to the 'on' position. does the yellow 'check engine' light come on? if yes, good....if not, you need a pcm (check fuse and relay first) and tow it to the dealer. is the 'security' light on the dash flashing? if not, good...if yes, tow it to the dealer. if you have an aftermarket alarm, look under the dash for wiring that doesn't look like it belongs there. if you see it, look for a couple of fuses taped up in-line with those wires, pull them out carefully and try to start it again. if you still have nothing, find the fusebox under the hood and remove the cover. put you hand on the larger black or gray plastic squares and rectangles. have a friend turn the key to the on and start positions and make sure you hear/feel clicks from the pcm and starter relays (follow the 'fuses and relays' diagrams in your owners manual or fusebox lid). if possible, use a test light to make sure all the fuses are good by putting the lights clip on the neg. battery cable end (or a bare piece of steel) and touch the lights pointed end to the metal top parts of the fuses. each fuse end should light up when you touch them (with the key on). if not, more than likely the fuse is bad. these are the easiest, cleanest and cheapest ways to do the basics. beyond that, i would suggest you have someone look at it in person. good luck!