What's your vocal warmup routine?

A proper warmup is important in voice work the same way it's important in singing or exercising.  I don't want to shred my voice by going from zero to a hundred with screaming or other loud, guttural, and/or stressful sounds coming out of my mouth hole without being ready.  Gotta make sure I'm nice and limber first, and also to build up to the most intense stuff so I don't blow out my voice before all the calmer, more normal stuff has been recorded.  So, what are some example warm ups for voice acting?

Really, the answer is whatever works for you.  Sometimes if I know I'll be recording as soon as I'm out, I'll sing in the car.  Not death metal or anything, obviously, but something more relaxed just to get the air flowing is okay for me.

Since voice acting is something that I have learned works best when I stand up and employ my whole body, some basic stretching and moving of my arms, neck, and torso are a great way for me to get loose.  You can try neck rolls, spaghetti arms, and other things white people do when they dance. 

It's also important to get the lips and tongue warmed up and ready for action, as weirdly phrased as that may have been just now.  Buzzing or blowing through your lips like a horse, WIDELY EXAGGERATED vowel sounds - A, E, I, O, U - and tongue twisters to get ready for whatever the script has to throw at you.  Say them three times fast, then three times fast again and try to get it as close to perfectly coherent as you can. 

There are a ton of tongue twisters online, but here are just a few I use:

• Unique New York
• Red Leather Yellow Leather 
• Supersonic Acrobatic Rocket Powered Battle Cars
• I Wish to Wash my Irish Wristwatch
• Susie Sells Seashells by the Seashore
• Rubber Baby Buggy Bumpers

You can also take a deep breath and go from your lowest to highest register, then back to low so that you sound like a siren going off.  Whatever stretches your vocal chords, your mouth, your neck, your jaw, etc. without hurting you.  

I'll say this because it seems obvious, but common sense isn't always common.  If it hurts, don't do it.  That's the opposite of what you want out of a warmup, and pretty much a standard golden rule for taking care of your voice at all times.

In the comments, I'd love it if any other voiceover folks that happen to come by this blog sound off with what you all do to warm up.  Any tips?  Tricks?  Stuff to avoid?  It'd be great hear from you!