Healthy Weight Loss

So now I have a fridge and cabinets full of yummy, healthy foods and a few cases of water. I am good to go and wanting 20 more pounds gone by April (to make it a full year old losing weight). I am still breastfeeding my 19 month old, so I know my body will fight for that fat. But I want it gone! =)
Soooo, here goes nothing!
Kadi
Apr '12- 248 lbs, size 24, 2-3 X
Jan '13- 168 lbs, size 11-12, Medium
Goal- 148 lbs, size 6-8, Small-Medium