Riddle time

I am a poor poster. I haven't posted in months. I need to catch up.
Here's a riddle for ya.

It can't be before.
It's never later.
It's when you should run when you see a 'gator.

or how about this one?

It makes a hole by turning 'round;
And holds things together, even upside-down.


one more, and I'm going to bed...

It may be up; It may be down.
You may even want to drive around.
It may be your home, even if it's small.
What one word will fit them all?