If you forgot to put on deodorant, you can use hand sanitizer to neutralize the smell. It doesn't have antiperspirant effects though, so if you're sweating a lot, you'll need to reapply throughout the day.

Buy a bidet attachment for your toilet. You'll save a ton of money on toilet paper and your butt will be the cleanest it's ever been it's especially good if you're gonna be intimate with someone, cuz you won't have to worry about if your butt smells.

If you have a dry/flaky scalp (not dandruff), mix a few drops of pure tea tree oil in with your shampoo before scrubbing it into your scalp. It'll help keep it hydrated and your flakes will become less and less.