How old is baby/child?
Clean diets are priority (and I need to start listening to myself, lol) ...... at least a MOSTLY clean diet would be necessary. The links up top will give you sample diets.
Fitting working out in needs to also be a priority ..... hard, when you want to spend time with a little one. Make it a "family affair" - go for a walk with a stroller, work out with a video at home (and baby/child can be playing next to you).
I am working on doing this - my little one is about 8.5 months and I REFUSE to take time away from her. SInce I work full time (more than full time, lol) I want to share every second with her when I can - and I will not take time away from her to go to the gym. I would rather be fat right now. THAT SAID, I am tired of being out of shape. I am working on scheduling time to workout WITH her, so I can still be with her. My work is crazy, so it is hard .... baby steps.
If you are coming from a state of couch-potato-ness .... then any bit of movement is helpful. Even something mild like going for a 30 min walk will help. Lifting weights will be VITAL to gaining some shape back - it will help boost that metabolism and get you feeling "tight" again. I swear, since having a baby, my metabolism is shot. A lot of that is a loss of muscle mass, I am sure. Gaining that muscle back will be helpful in losing lbs.
Try tossing the processed foods, focus on fresh foods. The stuff i nboxes is not worth your time. If you have a toddler - STOP eating off his/her plate. It is so easy to grap ahandful of goldfish, a handful of chicken nuggets, or whatever - cleaning their plate when they are done eating IN ADDITION to your dinner. All those excess calories add up!
Cut out the sodas, juices, sweetened drinks. Juice is empty calories - you are better off having a REAL orange than drinking OJ. That goes for a child too! Try to drink at least 1 gallon of water a day.
That is all i can come up with now ..... Baby Daisy needs dinner .....