Now and then, I edit articles about various subjects, including language, geography and film. I often feel compelled to edit wording and punctuation, in order to make a sentence more easily understandable and thus more accessible to other readers.
I often use Wiktionary as a source of reference to look up spelling, definitions and usages of words in many languages. Sometimes, I edit articles, if I feel I can improve them. Mainly, I just make small, minor edits.