Set Heading Procedures: Take time, turn onto correct heading, check correct general direction, align DI and Compass, check fuel, ETA, Radio call...
Then at checkpoints chosen as distances gone that divide into 60 (remember the 1 in 60 rule 1 Nm off in 60 Nm is 1 deg off track) So 15, 20, 30. At 15 put times 4 on the map, at 20 times 3 and at 30 times 2.
You arrive at the 20 Nm checkpoint in 13 minutes elapsed and pinpoint yourself as 3 Nm left of track - so multiply by 3 and you are tracking 9 deg left. Turn 18 deg right for 13 min to regain track (double drift) then left 9 deg to mantain a heading corrected for the drift experienced on the first 13 min.
Worked for years at low level in harvards etc so have fun....