1, a very rough route picking up any points of interest I fancy visiting.
2, I decide how many miles I want to walk each day (16 this time with a lot of wild camping)
3, I make the rough route more accurate so it can be followed on the app while I create the final route
4, finally I follow the second route plotting each twist and turn and working out wild camps/campsites even the odd hotel as I progress the final route.
4, the last bit of mapping is going through Google and Google Street view to locate shops and eateries on the route, handy for knowing how much food to carry on each stage!
Note
When it comes to printing the maps it's a bit of a pain that the latest version of memory map hasn't got printing available yet!
But you can easily transfer the route onto the old version that's free to download then print from your purchased maps,
Make sure when printing to choose landscape or portrait and to print both sides of each sheet to keep map weight down.... I generally print 1-50000 scale maps at 1-60000 to reduce size a bit more!