Cardio
The American College of Sports Medicine reports that you can elevate your metabloism for up to 24 hours post-exercise by adding just one little twist to your exercise routine: intervals. All you have to do is inject brief periods of intense effort into your regular walks (or runs, swims, bicycling, elliptical sessions, etc). The intensity effectively resets your metabolism to a slightly higher rate during your workout, and it takes hours for it to slow down again. That equals ongoing calorie burn long after you've showered and toweled off.
Push-Up
This strength-training move is a classic for a reason. It fires up your chest, shoulders, and arms, and even gets your abs working when done with proper form.