3. Keep it casual: The one mistake is having expectations the morning after a one night stand. Don’t expect the other person who was so sweet to you the night before, to woo you the next morning, too. It’s better to just accept that it was a casual hook-up so that you won’t get upset or feel offended. If you’re in the right mindset and on the same page as the other person, then you’ll leave with no regrets.