Walk your favorite shopping location. When the weather outside turns cold and rainy, it can be hard to keep up with your walking or running routine. Head out to the mall or other indoor shopping facility. You can still get your exercise in while getting a little window shopping done as well.
While you may expect a longer workout to be beneficial, you should keep it to an hour tops. Once you reach the 60 minute point, this is when your body will begin to produce cortisol, a stress hormone. This hormone can block testosterone and waste your efforts to grow muscle. Keep it shorter and make it worth more.
Focus on your workout. As long as you are making the time for fitness, make the most of your time by really focusing on your workout. If you are going at a pace at which you can comfortably chat on the phone or read a book, you are cheating yourself out of results. Really push yourself during your workout and save the leisure activities for later.