<prompt> Human: Hey everyone, some background information: Im currently 18 and in college. I work and have a steady income, but its in a family business, so all of the money that I make is cash and under the table. I recently jut got a Discover It card with a 1,000 credit limit and not APR until March 2017.Whats the best way for me to utilize this card in order to build my credit? I dont really need a credit card. The only reason I have this is to start building my credit history. But Im not sure what the best way for me to do that is.Ive gone through some other posts on this subreddit and have done some of my own research online. It usually comes down to one of two answers on every single post. On some posts people will say If you really want to build your credit, you need to use your credit card as much as possible and then pay it off in full every month. No exceptions. If you dont pay it off in full it doesnt do anything for your credit.Other people will say Use your credit card, but DONT pay the full amount every. Leave a little bit of money on there and pay the interest to build your creditIve also heard a lot of people mention how much of your credit line you should utilize in order to build the best credit. Some people say you should utilize 15 every month while some others say you should utilize 25.Whats actually the best and most effective way to build my credit? How should I pay my card off every month? How much of my credit line should I actually utilize?As I said before, Im just an 18 year old thats looking to build their credit from the ground up.Any help would be appreciated, thank you!  <response>: Pay it off completely. There is no advantage to not paying it. 