How does one reduce cellulite?

I'm 18 years old & I'm just an average size. I recently joined a gym and I go Mon. Wed. Frid. I don't really know how to reduce this cellulite problem, so I kinda of just to the general stuff, because I don't know what I should be focusing on. I have cellulite on the back of my thighs and buttocks. When I go to the gym, I run about 3-4 miles, then I hit the machines for about 30 min or however long it takes me to do the whole set of machines, and then I finish my workout by running 1 mile. I'm not really sure if this is helping my case, or what I should actually be doing.

I'm very good on exercising, and I think I have to focus on what I eat also. But to tell the truth, I really don't eat a lot of fast food and I am very conscience of what I do eat. When I do eat, instead of eating 3 big meals, I usually eat 4 smaller meals. I don't know, that's just how my body works. But then again, that's why I am asking this question, since I don't like how I look. Does anyone have any advice?