trouble starting sometimes

If i dont drive the car for more than 24 hours, it has a REALLY hard time starting. I have to hold the gas down have way for a while and it usually kicks up (dont know if that is really what does it, but it works). I dont want to wear out the starter, so i was wondering if there is anything i can do. Is the engine just tired? heh Should i replace some wires or anything? The car has 140k miles on it...completely stock.

have your battery tested.

I'd check the battery first, I had the same problem, I replaced the battery and it never happened again.