A great fitness tip is to make sure that you're targeting all of your muscle groups. Don't just focus on your chest, triceps, and biceps. Those are the stereotypical beach muscles. Hitting all of your muscle groups will provide you with a more balanced and desirable physique.
If you're having a difficult time fitting exercise into your day, try doing it early in the morning. If you wake up and tackle your exercise plan first thing, you won't have to worry about it for the rest of the day. You can also often complete a thirty minute work out before the rest of your household is awake, making it less of an interference in your every day chores and duties.