Borrow a battery out of another car first if you can. Unless your battery has a dead cell, if it cranks fine the battery should not be an issue.

Check for spark. A timing light is the easiest way to do a quick check. If you don't have one, pull the distributor cap and make sure the cap and rotor terminals are fine.

A car needs only three things to start...adequate cranking speed (doesn't take much), working ignition system, and fuel to fire. A shot of starting fluid will tell if it's a fuel issue. Your ears will tell if it's a cranking issue. If neither, then it's likely an ignition issue. Ignition fuse, points or module, coil, coil wire, distributor cap, rotor are the possible causes.