As Blazin said, the best and easiest thing to start with is checking for spark. Pop a plug off that engine and have someone turn the engine over. Ground the plug to the metal of the engine and see if it sparks.
If it doesn't, That will take you in the right direction: ei: coil, distributor, ignition switch, etc.
If it does spark, check vacuum, fuel pump, fuel injectors/carb, compression, etc....
SgtDel