47. Do make the large, obvious
tap targets
Touchable UI components are generally laid out along 48dp units.
http://developer.android.com/design/style/metrics-grids.html
http://www.slideshare.net/AndroidDev/android-ui-design-tips
48. Do use screen density
independent units (dp)
http://developer.android.com/guide/practices/screens_support.html
not density independent (px)
density independent (dp)
49. Do create versions of all resources
for high density screens
http://developer.android.com/design/style/devices-displays.html