Someone explained the main rules for a successful Polaris once.
1) don't be late
2) don't be late
3) don't be late
4) if you must be late, don't be more than 10 minutes late.
Nothing quite like giving it everything for two days (and usually on naff all sleep) to see your points wiped out, or at least reduced to the level of people who had a nice pleasant tootle
Top skills for doing well at that event include being able to look at a map and assess how long it'll take to ride a bit of trail, and being able to see all the options for linking up as many checkpoints as possible. You have to decide whether or not to go for the big scores or more little scores. Best plan is to head for big scores VIA as many small scores as you can. And once you've decided, you must not faff. Don't stop for a biccie and a breather at each checkpoint, you're in a race. Your navigation must be bang on - no mistakes, no dithering, no trying to decide which hillside you're on.
TQs are the same but much shorter and much easier