Practice Mindfulness

You may have already tried all those mindfulness apps. But exercises like meditation that teach your brain to focus on the present instead of the past or future can increase feelings of self-acceptance.

"The idea is to be present -- don't judge your emotions, but recognize them," says Elizabeth Dunn, a psychology professor at the University of British Columbia.

(Another caveat: If you have PTSD, proceed with caution or check with your doctor first, as mindfulness exercises may be triggering, experts say, because they can unearth trauma.)