If you are backpacking, remember that weight quickly creeps into your pack. Before you start, draw up a list of essential items, then pack your rucksack, unpack it and spread the contents onto the floor. Have a good look at what you intend carrying on your back for the next two to three weeks. Many people are lucky with the weather, but you may not be, so it is advisable to take along a waterproof, hat and gloves - even in summer. Jeans are hopeless as they provide no protection on a cold day, especially if they get wet.
Shorts are also useful on sunnier days.
Strong boots or shoes with good ankle support are essential. Lightweight boots which shrug off clogging peat are best. The Way is not an easy walk. You need to be fit before you start and be able to use a map and compass. If you have any doubts about your ability to do the walk, try out your gear and your fitness on an easier walk or have a long weekend walk.