91 Honda Accord : some white smoke on startup
 

I have a 91 Honda Accord (automatic, 2.2 L I believe). I have a little white
smoke on startup, which goes away within a couple of seconds. I take it this
is coolant.

My questions are:

1) What are the possible causes? I know a bad head gasket is one, and a
cracked block is another. Anything else? [Something nicer? :-P ]

2) What can I do to help the situation, assuming I don't want to put a lot
of money/work into the engine?

Thanks in advance,
-- R Flowers