1. Find a good pair of boots and spend some time breaking them in. They should be as comfortable as possible for the ascent; otherwise, they may hinder your progress.
2. Take time to physically prepare your body. While Kilimanjaro is a trekking peak, you still need to be in good condition to ascend it. Start your training about four months before your climb and spend a few days each week doing some intense cardio.
3. Stay hydrated at all times, as your body will lose moisture quickly as you ascend. Summiting Kilimanjaro requires a lot of walking. Plus your body will dehydrate quicker at higher levels of altitude.