This tutorial is on how to easily survive the first night in minecraft.

So when you spawn it should be 6:00 in the minecraft world so you gotta work fast.
If there are trees near you, you are lucky here is a list of steps you need to take before sundown (monsters spawn at night).

• Get 10 logs
  
• Get 3 wool blocks
  
• Make a crafting table
  
• Make a wooden pickaxe
  
• Get 11 cobblestone
  
• Make a stone pickaxe
  

Shelter

• Make a bed
  
• Start on shelter (materials depend, not counted)
  
• Create a front door for your shelter and include a back door as well if at all possible (back door not included in above material count).
  
• Create a storage chest and place it in the shelter
  
• Create a furnace
  
• Smelt 1 log to make charcoal unless you found coal (3 logs and 2 planks will most efficiently use these materials [also not included in the material count])
  
• Create some torches and place them
  

That should be everything you need, but if you get caught outside with no quick way of getting home dig three blocks down jump in, fill the top with dirt , and wait till morning.
I find that this video helps a lot.
http://www.youtube.com/watch?feature=player_embedded&v=CL3Ai7HknT4#!
Thats about it if this helps anyone please leave a comment or a diamond :D.