(For your five favorite Carole Lombard movies, that is.)
Here's all you have to do:
Go to vote (if you haven't already!) at http://community.livejournal.com/carole_and_co/#102124. Do not vote at this entry; it will not count. Follow the criteria given at the election entry and choose your five, in order, with #1 being your favorite.
But remember -- the deadline to cast your ballot is midnight (ET) Saturday, May 31. So if you haven't yet made up your mind, think it over, then vote. You have slightly less than a week.