Are you feeling irritable or agitated at all? That's when I usually give in to similar impulses. I have this problem a lot because I'm pretty isolated right now. I'm left alone with my thoughts and then I get the urge to dump them on someone when I really should just be journaling.

This is a hard one because it's a willpower issue. Are you aware that your emails or texts could get you in trouble before you send them? If so, you have to force yourself to put down your phone or walk away from your computer and leave it until the next day. I usually see differently by then.

If I'm feeling pretty wound up (racing thoughts about what I want to say, really itchy about expressing it) I might take an Ativan PRN to help bring me down.