Go through each of these exercises 3 times, take minimal amounts of rest in between each exercise and then take 1-2 minutes in between each series of exercises.
The key to this workout, like any other, is progression. You should push for more reps each time you do this workout. If you get 14 pushups in week 1, you should try for 15 pushups in week 2. As long as you keep progressing you will get bigger and stronger.