Diablo 3 - Phoenixrage's Demon Hunter Guide - updated

So I play quite a bit of D3, and I check out the Diablo Sub reddit when I'm not playing.  My main character is the Demon Hunter, and I see a lot of people still with questions on what to do with the Demon Hunter once you reach Inferno and even in general.  So I'm going to try my best to remember how things were early on for me as a Demon Hunter in D3, and hopefully get some tips for those people who are still relatively new to the game and or the character.

Things to keep in mind, my first character was a Barb, and second was a Wizard, the Demon Hunter was my third level 60 character, and ended up being the one I picked to be my main as things moved forward with paragon levels.  I also leveled my Demon Hunter around the 1.03 patch, so some things may not apply now, but its just how I remember it.  (warning, this maybe a really, really long post).