Two items mentioned here;
As someone told me and I found out from experience. Credit cards will not bill you for any balance under 50 cents. So if you are paying ahead of the closing date you can safely leave off the change if under 50 cents. The credit card company will take you down to a zero balance.
Paper maps are nice to see the surrounding country, GPS units get you from point A to point B; but you may be within a short detour off your route to visit an interesting place. With GPS you may never see it on the screen and miss it. I love Delormes Gazetteer series. If the boon dock road doesn't show on these maps then you do not want to be on it.
For example you could miss the Grand Canyon if you relied on GPS to get you down I40. It would not show up on the routing. Sure you could plan it at home but once on the road not a chance of seeing the Canyon on the unit.