I used to let Gab crawl around the bathroom sometimes with some toys. Or sometimes I'd put her in her cot with some toys and take the monitor in the bathroom with me so that I could hear if she was getting upset etc. Normally she was ok because I'd only be 5-10 minutes.
Other times I'd set her up with breaky in her high chair then pull the high chair into the doorway of the bathroom.
It all depended on what mood she was in.
If I woke before her in the mornings I'd jump in the shower straight away! LOL It was like a race
Now that she's almost 2, I just stick Nick Jr on TV (or a Wiggles DVD) and just go and shower. She's normally ok for the few moments I'm in there. Otherwise she'll bash on the door and shout "MUM!" LOL. Not a moment of peace