help
Here's a good link with some lots of FREE useful info...
http://www.bodybuilding.com/fun/bbinfo.php?page=TrainingatHo me
Just a suggestions...pick a couple of exercises like squats and pushups and just do them back and forth, without rest, for a set time like 15 or 20 minutes...you'll get your cardio and strength training in at same time. It doesn't matter how many reps or the exercises, just keep moving.
Good luck
Earl