Actually, I'm one of those Windows Phone guys and I run CyanogenMod on my HP TouchPad, so I am familiar with the web versions of the Play store and Windows Marketplace.
I find I usually click on App URLs from sites like Engadget, that I trust.
On Planet Android there are frequent posts along the lines of "10 best apps for X" (where X is something like exercise, cooking etc) or roundups of new games for week. It is reasonable to assume the posts are written because they are read.
Can you get an install to happen to your device when going to a Windows Marketplace page on a desktop (without tethering your device etc)?
I find I usually click on App URLs from sites like Engadget, that I trust.