Don't over sharpen it. It doesn't take much to put a good edge back on it. Just a few strokes with the right size file and your back to new,
And like already said, keep it out of the dirt!.
I liked to have 2 or 3 cheaper saws than one really nice on. That way I have 2 or 3 ready to go and by the time I need to sharpen all the blades I'm ready for a break! lol
I use to cut a lot of trees and the smaller lighter saws weren't so hard on my little azz! lol
Good thing for me is I'll be coming your way in a few weeks to see just how good the freshly cut fire wood feels!