Any suggestions to lose weight?

I'm 135 pounds. I used to weigh 160-155 pounds. I dieted by stop drinking soda, drinking lots of water, and basically watching what I eat. I became more active, by taking walks and not just sitting around. I stopped losing weight once I hit 135. I want to lose 10 pounds before I have to go back to school in august. I'm going to do 30 minute workouts on my exercise channel every other day. I just want opinions, and if you have any other methods of losing weight, please tell me.