If you are tired of waiting around or you are just in a rush, dip your hands into a bowl of ice water for 2-3 minutes.
Yes, it does sound a bit ..well, cold, but if you are like me, I absolutely HATE smudged nails. It can ruin my whole outfit, and if I am out, I hate having messed up nail polish, I wont even go out if it's slightly chipped!
So doing this is a real life saver and time saver for me. It's really simple, it's practically free, and the cold feeling, yeah, you'll get over it.
Just paint your nails, wait till they have set, as in they are a bit tacky, don't just paint and dip, wait at least a minute at the end of your 3rd coat, then dip for 3 minutes and your nail polish will have hardened. And if you're not into the cold water, try a blow drier on cool setting or you can try Avons Liquid Freeze Quick Dry Spray.