When you put nail polish on your nails, how long does it last before it starts to chip etc.?

I don't bother doing my nails often, because whenever I do the polish starts coming off/looking bad the next day. I've tried various brands of nail polish, doing one layer vs. several, etc. and it happens pretty much irregardless. I have no idea why this is, it's not like I wash my hands with OCD frequency or anything....anyone have any ideas?