If you don't want your eyes killed by the 8" screen, you should connect it to a large monitor whenever you can. Then you need a USB-VGA or USB-HDMI adapter. I have used some EVGA for many years, they cost me only $20/ea and come with VGA-DVI adapter, nice retractable cable and carrying pouch.
And you need a USB hub. If you need more than 4 ports, you may chain more hubs or get a 7-port one. I like the one from RadioShack, it is the smallest and thinnest, only a little larger than a US quarter.
Now let's put them together, plus charger, mouse and keyboard:
Don't get a big head from above picture; afterward, there will be only one little plug to deal with, neat, no hassle:
Note that I did not use an OTG adapter on the Miix side, only a micro USB cable that comes with any smartphones these days.
Some more adapters you may also need
I like this tiny and cute OTG adapter, the tiniest I've seen:
This right-angle one is also nice:
And this one is a transformer - you can bend it into any shape and angle:
As the Miix charge cable has a micro plug like those for smartphones, you need this adapter to plug it into a USB hub if you want to charge your Miix while using USB devices （see this article for more details on charging Miix):
If you need a microSD card reader, these tiny and cute adapters are handy. They can be plugged into both standard and micro USB ports and the right one serves as the above adapter as well:
All above adapters cost only few bucks and take very little room. They are good to have in general, not just for Miix.