Up to your half way point use double track error - i.e. 5 degrees left of track after 6mins, 10 degree correction to the right for a further 6mins then correct 5 degrees left and continue. The plan is to fly across as much of your planned route as possible. No point in getting to your half way point and making a big correction from there. After half way use track error + closing angle.
A big part of it is chart study on the ground, identify obvious features and at what time during your flight you expect to see these. This helps you with keeping on track and with your timings. For example expected to arrive overhead bridge a third of the way along track - arrived 2mins late, therefore add 6mins to your ETA etc. Remember to add 5 or 6min marks on your map.
If you can minimse the amount of brain time for actually navigating this will free up capacity for flying an accurate altitude, speed and heading!
