Jonathan Peppers shares some amazing links and tools for making your Xamarin.Forms Android applications sing. Including some techniques for Benchmarking performance and a bit of a dig into Bitmaps in Android (everyone's favourite topic).
Xamarin.Forms Performance on Android by Jonathan Peppers
A good UX practice is to use a relative time formatting instead of showing dates using normal date formats. It helps the user to have a quick sense of the timeframe without having to calculate exactly when it happened, also provides a better look and feel to your app.
Relative time formatting in Xamarin Forms by Rendy Del Rosario
Grids are an awesome way to layout Xamarin.Forms pages. If you aren't a Grid Guru (TM), check out this article by Charlin Agramonte where she covers off the key things you need to know to be productive.
Grids in Xamarin Forms Made Simple by Charlin Agramonte