I'm fairly new to FFG's Star Wars, but I had an idea I'm going to try next time we play (which will probably be next year): Binder clips.
I got myself a bunch of small (19 mm) binder clips in different colors (white, black, gold). My plan is to set them up on top of the GM Screen - gold for a PC slot, black for an NPC slot (with whites for extras). That way, both I and my players can see the initiative order at a glance.
You might consider having a magnet per character, and as players and NPC's take their turns, put the magnet on it to show that they've acted...
That's a pretty good idea. I'll see if I can find magnets small enough and with enough different colors to work.