Let's face it: It's hard work getting motivated to work out in the evening after a long day at the office. But here's a tip that might make a difference.When you get home, make sure the first thing you do (after taking of your shoes and jacket, of course) is change into your workout gear, even if you don't plan on heading to the gym for a couple of hours. It's surprising how well it works -- once you're in your fitness gear, you feel obligated to hit the gym. And the best part? It takes less than a minute to do.