A while back, someone asked about useful certifications (https://news.ycombinator.com/item?id=31874802), but I thought the most interesting part of the discussion was what certifications people had unrelated to software.
From language skills to trade skills to first aid to skills related to obscure hobbies, are there non-tech certifications that you had fun acquiring?
Looking at your comment... I really should get re-certified for CPR and or WSSI.