Is there a way to find out all time which days are converting the best? For example, "Mondays are our best days while wednesdays are generally poor." Is there a report in analytics that can show this type of information?
I think what you'd have to do is, go to Content Optimization:Goal Conversion, set up a several month date range, then export it into Excel. Of course, you'd probably want to export a unique visitors count as well, so you can see volume interacting with goal conversions... But start by getting the data into your own hands.