Right this minute, go set your alarm and lay out everything you need for your morning workout. (Switch on a lamp as soon as your alarm goes off, says fitness blogger Tina Haupert, so you wake up faster.) Working out at the same time every day may help you improve more quickly, a study from the University of North Texas found, and other research has shown that people who exercise in the morning are more likely to stick with their workout than those who exercise later in the day. After all, if you get your sweat session out of the way first thing in the a.m., you won't miss out if unexpected distractions come up later in the day. (And while we're on the subject, skip the snooze button: Research suggests that those extra few minutes in bed may actually make you more tired.)