Border crossings by land are one of the most stressful parts of budget travel and they don't have to be. Here's what I've learned from 60+ overland crossings.

The rule that matters most: know the official fee before you arrive. Most land border crossings charge a fixed arrival fee that is publicly documented. Immigration officials at some crossings try to collect unofficial 'fees' on top of the official ones. Knowing the official rate means you can politely show your documentation (screenshot of the official tourism website) and pay only what's required.

Crossings where unofficial fees are common: some Central American land borders, the Myanmar land crossings (largely closed anyway), parts of West Africa. Less of an issue in Southeast Asia and the Balkans.

The practical logistics that reduce stress: arrive at crossings in the morning when possible. Afternoon crossings at busy borders involve queues that extend past closing time, which can strand you. Have your documents physically organized before you get in queue (passport, printed or downloaded e-visa confirmation, onward travel proof if required). Have the entry fee in local currency — some crossings will take USD but at unfavorable rates.

The biggest mistake I see: arriving at a land border without having checked whether a visa is required and whether it's available on arrival. Do this research for every country on your route before you start the route, not at the border.