The most important thing when preparing for a hiking adventure is to look for in a hiking boot that fits correctly. Make sure you get a quality boot, and then do whatever it takes to get the perfect fit.
This is one of those times when you really should go to a hiking and trekking specialty shop with trained salespeople. Ask them to measure your foot first, even if you think you know your shoe size. Find out if they can customize the fit of the hiking boots.
A really good boot fitter can add or remove padding to make your hiking boots fit like a second skin. Ask about adding custom footbeds or insoles to your boots. This may seem like going overboard, but it can greatly reduce wear and tear on your arches. Finally, do not underestimate the importance of choosing the right socks. Choose a blend appropriate to the trekking conditions. Consider your adventure travel location be it the temperate forests of Washington State or the tropics in the South American jungle.