It never hurts to develop map and compass skills. You never know when you might need them. There are a number of websites on navigating with map and compass. You might want to check for a local orienteering club, too--a really fun way to learn these skills.

The classic book on map and compass navigation is this one.

IMHO, a GPS (which this luddite doesn't use) is a supplement to map and compass skills, not a replacement for them.