Agree with Foxmouth,
Don't OVERNAVIGATE the journey,
Try and take the " big picture " view of the topography of the land and not be searching for small villages and towns, and resist the temptation to be searching for your landmarks long before you are due to be at them as that can stress you out. Even using roads can cause problems as they may change orientation for few miles and throw you off. Better to take the " 30,000" foot view with hill ranges, lochs or if near the coast large peninsulas or inlets. If you use radio towers etc, back up there location when you plan by identifying a hill range that starts or stops abeam so if you miss the tower it's not a big deal. And remember the UK is a small country your'e never going to get LOST lost as no matter where you are, even in a spam can, your'e never more than 30 minutes from landmark or body of water, coastal or otherwise, that is easily identifiable. The only time you will have to have your nav spot on is for the test, after that is trim it out, follow the magenta line, sit back and enjoy the view. Remember it's supposed to be fun !!