I'll get everything ready the night before if it's an early morning ride. Camelback ready in fridge complete with anything I'm taking with me or packed next to sink with bladder out and ready to fill, bike set out, aired/lubed, gear laid out and waiting.
If it's a 4am slip out before the hubby goes to work ride I'm out of here in ten or less, but everything's been done the night before, I don't bother with teeth or sunscreen or food (have some with me, just in case), lighting is already set up on camelback/helmet and the dogs are still asleep.

Getting ready from scratch 1/2 hour is quick, I think.