Tablet Device Layout for iPad/Android/etc

I have a site that I’m noticing some slight discrepancies on a tablet device, namely, the Android (I don’t have an iPad).

The background seems to end (or is cut off) and some elements are going beyond that boundary. Can anyone make a recommendation on how I can accomodate the tablets devices to display a better visual for the design?

If anyone has a reference as to how I can correctly use media queries for certain devices (especially tablet devices), that would be awesome! I’m trying to create my templates to be more mobile/tablet friendly.

Thank you!

This is a simple but handy reference:

Very handy indeed. Thank you.