Motor swapping

[RawrImAMonster]

So, it looks like I'm being roped into helping my friend swap a motor in his 04 Forester (non turbo).  This will be my first time actually doing the full motor swap myself.

I've found some decent instructions for doing the swap on youtube and forums, but are there any common pitfalls?  Anything in particular I need to watch out for?

We'll be buying a habor freight engine hoist and load leveler.  I also recently purchased a Quickjack so at the very least I won't have to mess around with jackstands.