I don't really do anything on Wikipedia other than make one or two word updates (you can thank overzealous admins for their gratuitous dedication to their biases and conservative interpretation of notability for that).
I am however rather active on WikiVoyage where I contribute a solid paragraph here and there, which you can peruse using this link.
If you are a real grammar and spelling enthusiast you can look at my Wikipedia contributions here.
If you want to read something funny read the list of the 13 Yule Lads