I like to look around at the cars going by, examine the infrastructure around the intersection like the nerd I am, and when the countdown starts (the crosswalk signals usually have a countdown until they switch to "GO") I'm looking back and forth between the signal and traffic to see who's stopping and who's trying to beat the light.
I'm not about to trust my life to a signal when so many drivers are too busy on their phones to notice the big lights in front of them shining a different color than it did a second ago.