your iac valve is working mainly at idle and when you come to a stop after the engine is fully warmed up - that is why after driving it it acts up...

google "cleaning civic idle control valve" for some pics and a DIY on how to do it. if cleaning it does not help, then it is time to replace.

also - a tune up consists of the following, and should be done every 60k: (note: this is what I would do)
spark plugs (NGK or Denso)
spark plug wires (optional, but NGK wires are $60 at advance auto)
distributor cap
distributor rotor button
fuel filter
valve adjustment
fuel injector cleaning (bottle of Techron)
trans fluid replacement

if you have never done these, and do not know when/if they have ever been done - time to do it.