have added a few tips and advise that really helped me successfully climb kilimanjaro below:
1, Purchase gaiters. These help from water leaking into your boots when it rains and also from the bottom of your trekking trousers from getting muddy on rainy days. A very underestimated piece of kit.
2. Drink loads of water. I was drinking about 4-5lts a day on kili and I had zero altitude sickness throughout my trip. Get into the habit of drinking lots of water before the trip.
3. Keep your daypack very light. plan what you are taking in your day pack and don't carry too much.
4. Eat whatever is available. Your body needs to replace the huge amount of calories lost during the day so just eat whatever is cooked for you. We were very lucky as the food on our trip was amazing!
5. Gortex. Please make sure you have at least one Gortex jacket and trekking trousers. Plan as if it is going to rain every day. There is a MASSIVE difference between water-resistant and waterproof, buy gortex.
6. Down jacket. Buy a down jacket that packs into a little case so it doesn't take much room in your bag. The big style down jackets are too heavy and take to much space. I didn't wear my down jacket on summit night but it would be silly to go without the option of having one.
7. Walking poles. If you are new to trekking, poles are a must. I didn't invest must in my poles but recommend you spend a little money, don't buy the cheapest ones (medium range).
8. Take breaks. During the day, please find time to take breaks when you are feeling tired, it's amazing how a 5min break from walking can really make a difference.
9. Go with a game plan on summit night. Start with a light backpack and be prepared to change your approach. Don't worry about splitting from the group if you get tired, it's about getting to the top. I did hand my backpack to my guide when I was exhausted so please use them if you find yourself at a point of quitting (don't quit unless you have tried changing your tactic a few times)
10. Go SLOW. If you find the pace is to fast, please tell the guide leading you are finding the pace fast and they will adjust the speed of the group. You would rather add 30mins to a walk then totally exhaust your body.
11. Hand warmers. Please carry hand warmers in your day pack. On day four when it was snowing and my liner gloves got wet, it was amazing to have hand warmers in my pocket (I left my summit gloves in my duffle bag that day). I used hand warmers during my summit, between my liner gloves and outer waterproof gloves.
12. Waterproof gloves are a must!
13. Travel pillow. It was my first time sleeping in a sleeping bag and having a nice pillow was great. I used this one from Amazon and it was amazing for the price. Search Amazon for: Vango Large Camping Pillow - Black
14. Sunglasses are needed throughout the trip, It would be impossible to see on summit night without them after the sun rises. You probably won't even be allowed to summit without them.
15. Sun protection. Please apply factor 50 every day, the sun is very sharp.
16. Solar Nose Shield. Even though I had factor 50 applied my nose got very burnt on summit night and took almost 3 weeks to heel when arriving home (huge blisters). Please buy a nose shield that attaches to your glasses to protect your nose. I wish I had someone give me this advice before!
17. Tipping your guides and porters should be something your group discusses before your trek, have one person in charge of collecting money before. You should also tip your personal porter separately as a personal thank you and to anyone else who helps you a lot. I tipped my guide who helped me on summit night and my porter separately. The group tip is always a must, but also tip separately!
18. Donate old kit or stuff you will never use again, they will happily accept it. I donated most of my kit including my boots.
19. Preparation is key, please research everything before you travel so you know what to expect. Sites like this and Youtube will help.
20. Getting to the summit is about mental strength, never think of quitting at any point.
21. Tell your guides everything. If you feel unwell or anything, advise your lead guide. They are not looking for a way to send you off the mountain but can keep an eye on your symptoms and give advise. Your guide will only send you off the mountain unless you are very sick. Normally you will be told its normal which will put your mind at ease.
22. Have fun. Takes lots of pictures and videos, enjoy the views and ask your guides loads of questions.