I find it comes in different stages. For example, when you first break up and you feel the initial heartache, you might as well acknowledge it by listening to ballads, watching rom-coms and eating comfort food. As pathetic as it sounds, you're going to hurt at some point so you might as well get it out your system.
After a couple of weeks of feeling sorry for yourself, I then move into stage two. This is where you actually realize the person was a complete bitch, and you start listening to self-empowerment anthems and hanging out with your friends. I always find a new haircut, new clothes, and maybe going on a diet (if you need to) help as they make you feel confident and attractive again.
Word of advice, I've seen a lot of people suggest meaningless/random hook-ups. I know everybody's different but I wouldn't recommend this. You should avoid any kind of intimacy until you feel you are capable of dating again. I don't know from experience as I've never had a one night stand, but I've witnessed some friends go on a hook-up spree after a break up and it just hurts more. Especially if there's negative repercussions from the hook-up, such as rumors or self-hate.
Good luck!
