Yoga for the time limited and space confined
I swear I don’t work for this company, I just really believe in it. Yogaglo.com is an amazing website, basically a yoga studio online. You choose the duration of your class (20 minutes right after the baby goes to sleep right before you crash on the couch?), the style (neck and shoulder practice for those who have been carrying around a baby all day?), and teacher (I have my personal faves, email me if you want to know who.)
I highly recommend it. Moving even the tiniest bit does so much for our mood. Best of all is that you get a 15 day trial.