Cling to a wall with Shift, it allows you to perform wall jumps.
Find ammunition and food in aid-packages inside buildings, or call one on your own. 
You can craft weapons and ammunitions using a WorkBench.
Zombies can sense you from far if you are bleeding.
Use experience to unlock new skills, you can open the skill menu with Y.
Aid-packages inside buildings can contain usefull tools like night-vision googles.
Aid-packages inside buildings can contain usefull tools like grappling hooks.
Aid-packages inside buildings can contain usefull tools like parachutes.
Use a crafting table to apply attachments and dyes to your weapons.
Once you jump, your only escape is death.
Use wood to build bridges and connect rooftops.
Monsters will team up to take you down.
Monsters will hear you placing blocks, be silent.
Building will be crowded with zombies, even in the day.
Animals WILL fight back, I´d recommend some farming.
Zombies will try to destroy your light sources, aswell as chests, furnaces, etc.
Press Shift or right-click on items to pick them up.
You can lock your StorageDrawer with a key.
Creepers will try to breach the wall of your base.