New member... looking for advice

Hey everyone, I discovered this great site just yesterday and signed up immediately.  After reading a few posts and saw what a great help some people on here are, I figured I would start posting as well.

For my first post, I am basically looking for help to gain weight.  I am currently 22 years old about 6'1" and weigh approximately 140-145 pounds on average.  I play ice hockey about 2-3 times a week and go to the gym about 2 times a week.  I am hoping to gain about 10-15 pounds and would like anyone's advice as to what I should eat more of, supplements, etc.  I typically have a good diet mainly consisting of protein, fiber and carbs, and I try to eat as little sugars and fats as possible.

I have come to this board because I have been the exact same height and weight since I was a sophomore in high school, and I am now a senior in college.  Any information would be helpful, thanks!