If your bike pivots when being leaned against buildings or kickstands, you can slip a bungee around the front tire to the frame to keep it from turning and the bike slipping away. It's the same result as bungee-ing the brake levers closed....whichever works better for you. Here's a photo I found of someone doing it:
bungee tire

People do this also when their bikes are on the back of their cars on a rack to keep the front wheel from spinning wildly while the car is driving.