I still think old school is the best way. As much as I use electronic navigation on the fly, I still do a majority of my planning with a chart, dividers, and a pair of triangles. If you don't know how to use these items yet, put it on top of your to-do list! There are infinite resources out there for learning basic navigation, so I can't recommend one over another. With just a few basic skills, you'll have no problem planning trips quickly and efficiently.
Constantly fixing and upgrading aboard EIGYR, a 1983 Sabre 28 out of Brooklin, ME.