Happy Mediums?

Since my nineteenth birthday will be here in just sixteen short days, I've decided to do some reflecting on where I'm at so far. My first semester of college has come and gone and I fully understand the phrase "living for the weekends" now. I blink  on Monday and then it's already Saturday it seems like. I don't make shit at my job and my eating habits have changed dramatically. I get sick everytime I drink alcohol and I seem to either feel overly energized or extremely tired. I know all that is negative, but I've got to talk about it. Where is the happy medium? Christmas break made me happy because I was away from school, but now that I'm about to go back I'm worried I'll slip back into that "gray area." I need to brainstorm on how to be content without by just accepting the way things are. I need to prioritize and find things that statisfy my wants and needs. I feel like I see what I have to do, I'm just unsure how to get it done. Next semester I'll be getting three to four hours of sleep a night... this isn't okay! Working third shift, although financially beneficial, from just about every other perspective sucks. When I'm not happy with myself, its very apparent. At least to me it is. I start picking at other people I get annoyed very easily. I miss the old me who was always so laidback and just went with the flow. Where is this positivity hiding within? On a good note, I'm growing my hair long again and I've lost weight... however I think I need to find the beauty inside me before I can fully appreciate what's on the outside. I think I can, I think I can...