New investor, looking to build my credit

[Ryan Tongue]

Hi all!

Just a quick question today! I'm planning on buying my first rental property in the next 6 months (see my previous posts for more info on this), and in the meantime I'm looking for ways to boost my credit. I currently only have one credit card in my name that I pay off in full each month. Firstly, I receive mixed opinions on whether or not getting additional credit cards going will help/hurt my credit, so I'd love any feedback with that. Secondly, what are other ways I can build up my credit? To give a little context, I'm 22 and finishing up my degree at the University of Utah. I don't have any current debt. If there's more information that would help answer my questions please let me know! Otherwise, I'm looking forward to hearing all of your thoughts. 

Ryan