If you need to navigate to a point which may be more challenging to locate (e.g. Fenland) don't plan to route direct but route to a point (Initial Point) nearby which is easy to find (Spalding?).
Get overhead the IP and fly Heading and Time to reach "destination" - if you don't find point after the planned time, do a 180 and return to the IP and start again.
That said I often see students flying right overhead the turning point but don't see it as it's right below the a/c! I encourage them to do a 360 degree steep turn to take a look below - they usually see it then.
Of course there is GPS etc too but you also need to hone basic skills to be a well rounded pilot.