When I do it, I print up a checklist like the one in this article which breaks down Preparation, Engine compartment, Rear trunk, and Under the car:
https://www.pelicanparts.com/techarticles/Boxster_Tech/15-ENGINE-Engine_Drop/15-ENGINE-Engine_Drop.htm
I'd recommend using 6 Ton jack stands at a minimum for the height. Early on I used cheap jack stands on blocks - unsafe bad idea.
An engine support bar can be helpful:
http://986forum.com/forums/641804-post19.html
There are variations such as dropping the transmission separately, Tiptronic vs manual trans. Dropping the rear suspension with the engine is a good alternative if you are swapping an entire drivetrain to another car or replacing suspension components. Tom's Spec Car build:
http://986forum.com/forums/boxster-racing-forum/46070-spec-boxster-build.html