If you're doing more than one PC, like if you're a PC tech, or an IT Manager, then you can put that command into a batch file.
Here's the batch file:
@Echo off
cls
Rem: this program will disable Hibernation in windows 7.
powercfg -h off
Echo: Reboot. Then check for presence of Hiberfil.sys file in root directory.
pause
If it's your own batch file and you're going to use it more than once, you can leave out the last two lines.
I have this batch file on my Utilities CD and I use it often.