Know your physical limits and stay well within them. It is only too easy to get caught up in the emotion of the moment and exceed the boundaries of your strength and stamina. Pilgrims often try to spend every spare moment of their time in prayers and devotionals in Haram ash Shareef and often become sick. It is very painful and frustrating to get sick in a foreign country and an illness during Hajj is even worse as it defeats the purpose of your visit. DO carry an ample supply of general purpose medicines for personal use.
Most medicines are readily available in Saudi Arabia over the counter.
Talk to a pharmacist or see a doctor promptly if you need help. DO spend some time in studying and memorizing the layout and the location of your tent at Mina and Arafat, and your place of temporary stay in Muzdalifah with respect, possibly, to a nearby permanent landmark. All tents and pilgrims look alike. Should you get lost or confused, you will be faced with an extremely difficult, even an impossible, task of getting back to your base. DO be patient, understanding, caring and compassionate.