One of my favorite hair tricks that I learned in ballet. Ever wonder how ballerinas have such perfect buns? Some girls do have long enough hair to make a bun the normal way and hairspray it down so it stays perfectly. If you have medium or short hair though there is hope for you :)
Take a dress sock or knee high sock the same color as your hair and cut the tip off the foot. Then begin rolling it outward, it should look like a donut when you are done. Now make a pony tail with your hair then grab the sock and place your hair through the center of sock. Then spread the rest of your hair over the sock evenly and secure with a rubberband. If there is some hair sprouting out around the bun, bobby pin the hair down around the bun going in one direction.
This trick works really well as long as your hair is not shorter than your chin. Make sure you cover the sock fully with your hair and hairspray it dawn to secure any fly aways.
It's really simple and definitely something quick to do on lazy mornings :)