In order to fit training into your lifestyle, start with realistic goals and be patient. Once you achieve your first goal, set another objective that brings you to the next level. Always go one step at the time.
Circuit training is a very efficient type of strength training that will help you maximize your muscular endurance while saving time. You can also easily do it at home with low investment.
To improve your overall physical condition, you should focus on performing three 30 minutes workouts a week instead of training 90 minutes once every 7 days.