While there’s not much research to support this argument, I believe it helps to put your feet on the floor the minute you wake up.

When your alarm goes off, one of the worst things you can do is hit snooze.  Snoozing seems to increase sleep inertia.

Instead, once that alarm goes off, simply sit up and put your feet on the floor.  Start shambling towards the bathroom, or anywhere else that isn’t your bed.

There is something magical about movement that seems to speed up the waking process.