Well the general advice is: delete your social media presence (at least where there are mutual contacts), find a lawyer (if there are assets or children or a marriage involved) and hit the gym (to fight depression).
I've also found breakups to be a good time to renew relationships with family members (your long neglecated mother, aunts, uncles) and friends who are scattered all over the world. In my last breakup that's how I ended up meeting my wife who was working in Pakistan when I (on a whim and at her invitation) decided to visit her.