Drink water to prevent dehydration. The weather on the trail is often much different than where you live. It is recommended that you carry the following equipment. The clothing listed will significantly improve the comfort and enjoyment of your ride. If you always ride in a group, only one set of the tools would be needed for the whole group, but it is still recommended that each person carry their own tool set.
Compact pumps are light, popular, and fairly efficient.
Many adapt to either style of valve. Try cycling shoes. For a number of uses. Get a good selection, and check them against the bolts on your bike. If you don't have it and you break your chain, you'll be walking.