Initially when i was facing trouble to implement some re-usable things like making comments, organizing imports, etc.
Here are some shortcuts which we can use while doing programming in Android / Eclipse:
Toggle Comment => Shift + Ctrl + C
Remove Block comment => Shift + ctrl +
Generate Element Comment => Shift + Alt + j
Add Import => Shift + ctrl + M
Organize Imports => Shift + ctrl + o
Indentation correction => Ctrl + l
Format => Shift + Ctrl + F
