And once you configure your own keyboard shortcuts and commit them to muscle memory. I have set

  ctrl+] - select to the end of line
  ctrl+[ - select to beginning of line
  ctrl+d - cut current line
  ctrl+k - duplicate current line below
  ctrl+; - jump to beginning of line
  ctrl+' - jump to end of line
  ctrl+tab - switch perspective between debug and editor [1]
  ctrl+i - focus on console [2]
  ctrl+f - toggle find/replace bar 

About the last shortcut; I highly recommend you get a modern find feature and not the window popup eclipse ships with - http://sandipchitale.blogspot.com/2011/04/eclipse-findreplac... -

[1] For me this is pydev, for you could be the Android SDK ide.

[2] I have a pydev python repl running in eclipse for simple checks. Using ctrl+i to focus on this console is really nice.

Bonus if you customize your theme. Mine is a white text on black.