Tips for taking care of Macbook pro retina

Hello Apple Core,

I just recently bought a new Macbook Pro retina 15 inch and it's my first Apple computer and I really really love it:) Now I do plan to keep it for a long time and I know it cannot be opened or fixed easily so first thing I'd like to know if a dust gathering inside will be a problem and how to deal with that. I'm not sure if it will affect the performance in the long run. Also I'd like to know if the default fan options are keeping the machine running cool enough or if I should download software for that.

Also if anyone has any other tips on how to keep my Macbook alive and running smoothly, or just general advice for a new Mac user that would be greatly appreciated. Thanks guys:)