Wrap the string around the handlebar so you don't forget the puck and ride off like I did several times. Just pick the bike up while sitting on it and reel your puck in.
Zip ties, 8" of duct tape (with those two and some bubblegum, you can McGuyver quite a bit), Park multi-tool (compact tool kit for bicycles), face shield wipes.
Oh, and a 12 pack of Molson, just in case I need to distract a mob of angry Canadians.