Morning is a great time to do some kind of fitness routine. When I'm running I tend to enjoy them more first thing in the morning, they give me time to settle into the day and I find if I do them first thing I am more likely to stick with my routine.
A 5 min stretch can be a simple way to start something fitness related in the morning. There is a simple 5 min stretch here. It really does't matter how long you stretch, so long as you do it. If you only have a couple min pick a couple stretches and go for it. If you have more time repeat your session a couple times. Modify stretches to match your own abilities.
Do you think stretching is something you can do every morning?