^ Probably the best bits of advice of the lot IMHO.
I carry and use a GPS but if I want to walk a particular heading I find it much easier to use a compass (with the heading set from the GPS)
Having a map handy also gives you a big picture view of the area that you can't really get from a small screen. If you are above the bush line or can see out of a clearing you can reference far off points and get a good idea of where you are and where you want to go to.
Always, always take a map and compass. The Mountain Safety Council Bushcraft Manual will tell you how to use them and all sorts of things like true north, compass north etc
Cheers
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