I agree, any working out is better than nothing.
Do what you can, when you can do it.
I like to do pushups against the kitchen counter and squats while I'm preparing meals.
Do calf raises while you do your hair or brush your teeth in the morning.
While your watching tv, jump up during commercials and do an exercise for the amount of time that the commercial is on (pushups, squats, lunges, jumping jacks).
Also, if you're short on time, they say that jumping rope burns alot of calories.
Best wishes and get movin'