OS X shortcuts for a Windows power user

Hey everyone, I've recently switched over to a MacBook Air (running Mountain Lion) from Windows and for the most part I've got the hang of the keyboard shortcuts but there are a few I haven't found yet. Can anyone point out what these are in OS X?

• In Safari, complete the url I type (i.e. add '.com' to the end and go). In Windows this is usually Control+Enter.
• Maximize a Window. Windows + Up in Windows.
• Navigate back in Safari. In Windows, this is Backspace.
• Navigate up or back in Finder. In Windows Explorer that's Alt + Up, Alt + Left Arrow

Thanks guys! Loving the experience so far!

 

Hmm, thanks smirk for those. Looks like that list doesn't have one though for maximizing a window or for the Safari .com auto-complete.
The .com auto-complete is probably the more important one, I realize most people just search for sites instead of entering actual URLs, but I prefer skipping the search engine when I know the URL.

 

Thanks for the reply, for me, typing a URL and hitting enter in the Safari combined Search+Address bar just does goes to the search engine, unless I've already visited the site once, in which case it might automatically choose the right url from the drop down. I tried all the urls you mentioned with the same result. This behavior isn't what I'm looking for. I don't want to go the search engine at all, I want to explicitly type the name of the url and hit some key combination to have it automatically add the .com to it (and nothing else. just .com) and go.
I use this all the time in Windows (Ctrl+Enter), it lets me save time by skipping the search engine when I already know where I want to go and also saves me from typing .com every time.
Looks like this might not be possible in this version of Safari. I know it was possible in the previous version by hitting Ctrl+Enter or Command+Enter or some such combination.