I have a '90 Honda Accord LX with 72,000 miles on it. Lately it doesn't want to start 3-4 times a week. It turns over, but just doesn't start. It doesn't seem to matter whether the engine is hot or cold. If I let it sit for 10-30 minutes, it will start right up.
I changed the plugs, rotor, pcv valve, and all that jazz and it didn't seem to matter. When I bought the car and checked the plugs, etc, it looked like they hadn't been changed for a while, if ever. So it doesn't appear that the car has been maintained very well.
The first thing to do is get the car to your local Honda dealer. There they can check to see if the updated distributer assembly has been installed. In August of '93 Honda began calling in all 1990 Accords to replace the defective distributers.
They had electronic problems with the "Igniter" unit along with mechanical problems with the distributer housing itself -- both of which can cause a no start condition.
Aside from that, you need someone who's qualified to check for trouble codes, and the presence of fuel and spark while the problem is occurring.