Engine Degrease and Cleaning

[Senorx]

I will be attempting to degrease and clean up my engine bay for the first time tomorrow morning. Any tips or tricks? Dos and Don'ts? Anything not to get wet? Anything not to get cleaner on? Anything that needs to be covered? I have a pressure washer too. I also purchased some "Super Clean" which I was told is like "Simple Green". I'm still a total newbie and learning as I go along. Is it weird that I'm really excited to get started?

I'm looking to replace the air filter with a K&N Filter and new top too. I'm tired of looking at what's on top right now.