The idea of searching relevant sentences from Wikisource to illustrate the Wiktionary is a potential micro-contribution idea.
Original idea: https://www.mediawiki.org/w/index.php?title=Topic:T6ukmc98uuun7ydc&topic_showPostId=t71m2qvjmxzxbrpx#flow-post-t71m2qvjmxzxbrpx