Here's a tip for remembering your posture: wear a tight shirt! It's much more comfortable to sit up straight if you're wearing a tighter shirt; slouch, and your tummy pushes out against the fabric. If you're focused on keeping your stomach looking flat, you'll also remember to whip your posture into shape. A loose top, however, hides your stomach and gives you an excuse to stay hunched over. (And check out how this Fit reader improved her posture!)
Do you have any other tips for better posture at work?