A paper walking map is much easier to use when you can see the next stretch without unfolding the whole sheet in the wind.
Before you set off, find your route and fold the map into a manageable panel, keeping the section you need facing out. Make sure nearby junctions and landmarks are still visible; a fold that hides the next turn is no help.
As you progress, stop somewhere convenient and refold to show the next section. Avoid making sharp new creases over the same spot every time, especially on a map you use often.
If you're using a map case, arrange the sheet before sealing it so you can read the important details without constantly opening it.
Field tip: Fold for the next decision point, not just the neatest rectangle.