Knowing this about yourself is a great first step. You have the insight.

You can develop new habits. Some ideas:

use a timer of some sort, there are even free online timers you can find and download, using music or light cues, set the timer for a specific amount of time and then make sure to get up and walk around, do something else, each time it goes off

before posting or using any other type of online communication, get out of chair and move around, go to another room if possible, even outside, break the usual connection and give yourself time to think

each time you successfully do something different towards creating new habits, reward yourself somehow, small rewards can reap big gains

Good luck!