There appears to be a small myth that getting a Windows 8 store app on a Windows RT device during development is complicated. I think this stems from a) some of the (quite complex) blogosphere posts on Windows RT and sideloading for Enterprise and b) the expectation that some form of remote deployment/debugging will be required.
However, if all you want to do is install and run it then it really is very simple.
In Visual Studio, use the Store menu to create a package.
At which point Any CPU is normally fine – unless you are using a C/C++ component in which case you will want to generate a ARM package.
Now navigate to the directory
And copy the entire sub folder onto a USB stick. The appxupload is NOT what you want.
Place the USB stick into your Windows RT device and open the folder to reveal the contents.
Right click on the .ps1 file and “Run with PowerShell”
You will then get a series of prompts – agree to them all :-)
Note: If it is the first ever time you have done this on the device you will also be prompted to get a developer license (free).
And when complete the application will be on your Start screen – far right, unless you previously installed it.