My CPL instructor taught me a good method;
1. Pick a blindingly obvious feature close to your chosen waypoint/airfield, e.g. a town, big lake, mast etc.
2. Then take a rough track and distance from the map of big feature to chosen airfield.
3. Look from big feature along rough track and it should hopefully be there.
Just one method, and i'm sure there a loads more out there, and better!
Hope this helps,
GA