How to setup dual external monitors on a MacBook Pro 15" A1398?

Need to setup dual monitors for my new MacBook Pro 15" Retina Display A1398. I am in instructional designer and need the larger display from dual monitors. I think the best way is to connect using a Thunderbolt to HDMI adapter in the two Thunderbolt ports or HDMI out of the one HDMI port and the other using a Thunderbolt to HDMI adapter.  I have two Thunderbolt ports, two USB ports and one HDMI port. How do I setup OS X Mavericks for this as well. I want to run it in clamshell mode. Wondered if there are any better or easier ideas?
With peace and love,
Sam K.

Hi! I recommend you using both thunderbolt ports with their HDMI adapters, i don't know why but in my case it has worked better than having one monitor connected on one thunderbolt port and another on the HDMI port. As for the clamshell mode I recommend you this articles: Mac notebooks: How to use your computer in closed clamshell (display closed) mode with an external display and play-in-mac-os-x/.
This are a few recommendations:
1. Use a usb mouse and keyboard, because sometimes bluetooth ones are not that trusty
2. You could buy one of the fancy things (you can see one on the second article) that hold your macbook up to prevent overheating. If you can't afford one or you don't to buy one, you can prop your macbook with some books on the side of the union between the lid and the keyboard (i don't know the word in english) and a very heavy one on the other side.

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