I started a regime where I am eating about 1800-2000 calories a day on average and exercising regularly. For my workout, it is usually a 3 mile run, and I do this 3-4 times a week. When the weather warms up, I'll put the SPD's back on my mountain bike and do some 20-30 mile rides(which will suck, its a 32x18 singlespeed). My daily life is usually pretty fast paced, going class to class and doing physical labor a few hours a day. I have gained weight, despite doing all of these things. It is frustrating, and discouraging. I have, however, slimmed down a little, but I want to be lighter. What are some suggestions?