Be fear free. One of the main reasons people avoid the gym is they're afraid of being judged by other people. The truth is, the majority of people at the gym are there to focus on their own bodies, not yours. The sooner you overcome that insecurity the sooner you can focus on your fitness performance.
Every minute counts. Don't eliminate your exercise for the day just because you have a full schedule. If you're crunched for time, then crunch your routine. Simply decrease the frequency or duration to accommodate your workout. You'll feel better knowing you did something rather than nothing.