I used to have trouble working strength training into my schedule. When making tea, I used to put the water on, go sit down and wait for the water to boil, get up, pour the water into the teapot, set the timer, go sit down and wait for the tea to brew. Now, instead of sitting down, I perform strength training exercises while making tea - wall pushups, lunges, etc... Making 2 cups of tea a day can help me get up to 20 minutes of strength training.
A big fan of multitasking, I love the fact that I can hula hoop while doing other things - I watch TV and hula hoop; sometimes I read while I hula hoop. I'm also saving up for hula rings so I can use them on my arms at the same time.