How do you stop grinding your teeth during the day?

Lately I’ve developed the bad habit of grinding my teeth during the day. It’s strange because most people seem to do this unconsciously at night while sleeping and can wear mouth guards. Obviously I can’t wear a mouth guard during the day, though.

Most of the time I don’t realize I’m doing it, but when I do it really bothers me and hurts my jaw. Not to mention I’m wearing down my teeth. I’ve tried chewing gum and sticking my tongue between my teeth, but nothing seems to help.

Has anyone else experienced this or have any suggestions? It would be greatly appreciated. Thanks!