[PConvert]

What am I supposed to do? My powerbook occasionally locks during games and other applications. Should I just hold the power button for a forced shutdown - or is there something else I should be doing during or after a lockup?

[bradoesch]

Hit Command+Option+Escape. Click the app or game that is froze and press 'Force Quit'. If that doesn't work, then hold the power button or press the reset button.

[zachs]

Try to force quit the application using Command-Option-Escape. If that doesn't work, use Command-Control-Power to force a restart.

[Big Mac]

I would investigate particular reasons why the applications may be crashing. I would also try Ambrosia's Escapepod, which allows the user to force quit an application with one keystroke or to force quit the entire login (in a more extreme case).

[Edit: replaced VersionTracker URL with link to the developer's page. Everyone: please avoid linking through VersionTracker, etc -- it takes many more clicks, ads, etc to get to the developer pages that way! -- tooki]