You probably need to provide a little more info. For example, when you turn the key to the 'on' position, is the dash lights on? Do you hear the fuel pump? Either way it sounds like its time to get yourself a current tester ($1.50 at wal-mart) and start checking wires to see if they are hot. If your dash lights are on when you turn the key, I would first get someone to try and start it and see if there is any power to the starter. Of course I don't need to tell you to be careful when doing this as to not be too close to any moving parts of your engine in case if decides to fire up while your doing this right?? 
I'm sure people here could help you more if you give a little more info.
I'm sure people here could help you more if you give a little more info.