Interesting. I give myself credit, I just don't believe in bragging about it. (Not that I'm saying you are -- but this ties into a discussion I've been having elsewhere with someone.) I don't need to boast about my accomplishments to make myself feel better -- I know what they are, I know I did them, and that's plenty. I don't see the point in showing off.
As for the smaller things you mentioned, getting out of bed and showing up for work every day is pretty much my biggest achievement at the moment!