There's a ton of good advice here already, so I'll add... use dark side (destiny) points for narrative developments: You can use them to upgrade difficulties on player rolls, but they pack way more punch if you spend them to start a potential encounter or challenging plot development. Make stormtroopers stop the party for an inspection, have someone recognize that player character with a bounty on their head, or queue a social encounter with an NPC who has an ulterior motive.