Press Cmd+Delete or Shift+Delete on inactive accounts
The first thing you need to do is delete every old – email, social media, purchases etc – account that you have created. So this might be the first email id that bothers you Yahoo either Hotmail either rediffmail (Yes, there were email accounts on Rediff). Or that MySpace account that looked great then but is useless now. You can try AccountKiller.com and permanently close some popular accounts in a jiffy. There is also JustDeleteMe, which tells you how easy/difficult/impossible it is to delete the popular accounts you have created at a time.
Check if you have ever been hacked or data has been compromised
Haveibeenpwned is a great tool to check if your data has ever been hacked or not. If your data is leaked it is likely that some part of your digital identity will always be online. But what you can do is check which accounts have been compromised and then get down to removing them. Be prepared to spend a lot of time doing this.
Trash your social media history
Embarrassing tweet? Perhaps. Serious Facebook post? The possibilities are high. Unfortunately, Twitter doesn’t allow you to bulk delete your old tweets, but there are third-party services/apps that can do this for you. Facebook makes it easy because you can go to “Settings & Privacy” and then to “Activity Log” and delete those less-so-better types of posts. The gist of it is that if someone searches you on Google, pictures and posts from Facebook will pop up, so it’s better to trash them if you want.
be alert, be aware
It’s a pity, but a vast majority of people online are very careless with their data and so end up sharing more than they need or know than they should. Choose browsers, search engines and apps that are not data hungry or always hidden in the background.