Food for thought...when we lose weight (or are trying to) ~ it is important not only to exercise, but to do light resistance training. I didn't always know this and I haven't always been faithful to do it, but it's very easy to add into the daily routine. Apparently, women are extremely susceptible to muscle and bone loss while dieting. Even if you are one of the fortunate ones who does not need to lose weight, you will help protect yourself against osteoporosis if you work some of this into your day.
Get some dumb bells (start with light weights...even one or two pounds) and search out a basic routine on the internet or from a book and do it! One of the programs I have used is this easy "8 Minutes in the Morning" routine by Jorge Cruise. It is a great place to begin!
Increase the weight when the exercises become too easy. Just be sure to begin with very light weights if this is new to you! Even 10 minutes a day will make a difference.
Now, where ARE those dumb bells? ;-)