This only takes a couple of seconds, however can help you greatly in each game you play. Having your players play in their favored position provides a bonus, makes them more powerful and increases your possibilities of winning. Rarer cards are instantly much better, however in a lot of scenarios, positioning a rarer card into a non-preferred position is still even worse than positioning a more typical one in its favored area on the court. Take some time to inspect what your finest cards are and make sure to organize them in such a way that they're constantly playing their preferred position (or any of the 2 if they have numerous positions they can play in).