Writing about a birthay party

Writing about a birthay party:

Hi, guys:

As you know, next Friday I'm having a birthay party in my house. Everyone's invited but, please, contact me before coming. 

The party will start at 6 o'clock, so be there at 5:50. We'll do lots of cool stuffs and, it will be better if you bring some music, DVDs...

So remember: if you'd like to come, contact me!

Nicolai