Searched previous posts but could not really find what i was looking for, forgive me if i missed an obvious post....

Just made platinum and intend to take the 4 RUC's as my choice benefit.

But just what is the best strategy to use these? Apply them to a booking well in advance, or wait till a few days before flying if the upgrade list is long and I am way down on it? Or wait till the day of flying?

Any insight is appreciated!