@Ana1234 - I bite my nails, so I like to have a manicure at a salon every few weeks to stop myself from doing that. There's nothing that will remind me not to bite my nails quite like getting them professionally polished so that I know I'll wreck them if I nibble on them at all.
For a while I was getting artificial nails put on to cover the ragged ends as well, but they've grown out quite nicely. I'm hoping one day I'll get over the urge to bite them completely, but it doesn't seem to have happened yet.
I can't quite bring myself to get a professional pedicure though, so I do that at home. It always seems a bit too private to have someone fiddling with my bare feet for half an hour.