When i'm at the red light, i usually browse through my phone - check emails or more like deleting junk emails or see what my social friends are up to. Then sometimes, I just like visiting my interrupted thoughts that I had since I started my car to head home.
Thoughts about everything. It would be from what do I feel like eating at dinner to what will we do on our next long vacation to where will I be in 10 years from now.
Oops! Light just turned green. Gotta go!