Aa a wise instructor once said,
'The only way to refold a map is differently'
Don't worry after about 10 years of carrying around a lump of football shaped paper clamped with bulldog clips you'll find a way that suits the way you need it.
For example I know lots of SE based pilots who cut wales and everything above watford off the half mil. They base all of their flying on the cheaper more friendly and ironically more accessible french arifields. This makes the map much more manageable. You just need to think what you want from it.
If you make a mistake with this approach the good old CAA forces you to buy a new one every april anyway.