Nail polish - a few tips

Apply the nail polish as you always do, let it dry, then spray some hairspray over the nail polish.

If you have a dried out bottle of nail polish - put in hot water for an hour and it will be liquidy again.

If you spill nail polish on your carpet, sprinkle some glass cleaner on it, wait for 2-3 minutes and then wipe with a sponge. (Check before though if your carpet won't get lighter).