I didn't have time to stretch at all this morning when I arrived at work. Sat in a 2 hour meeting and could hardly walk when I got up. Perhaps it depends how old you are.
+1 on the foam roller. I can't get a decent stretch on some muscles of my left leg because of arthritis in the hip. I thought I was getting meniscus problems in my knee until I heard about the IT band. Sat down and felt the sides of both my knees and the left one was so obviously tight compared to the right. My doctor mentioned the foam roller, so I bought one and, after a few uses, involving the most exquisite pain, it was so much better. I use it all the time now.
I also lowered my saddle very slightly to stop the ITB rubbing across the lateral femoral epicondyle about 12,000 times every day during the commute!