Help! My steering quit! (PROBLEM SOLVED)

Jack up the front end, run the engine (idle or just above is fine) and turn the wheel lock-to-lock several times until low speed boost comes back. It can take 20-30 full lock-to-lock travels sometimes to get it all.
Even then, it's still possible for air to get stuck. The fluid can also aerate (foam) while you've got air in the system and make it even tougher to get it all. Keep checking the reservoir and keep turning the wheel from lock-to-lock until power assist comes back.

It's possible something else broke or is going on, but is most unlikely. Do the free stuff first...