My favorite Eclipse shortcuts

Select the current word

Ctrl + Shift + left/right arrow

Comment out selected lines

Opt + 7

Open Type

+ Shift + T very handy when you know the name of the class you need to check

Move selected lines up/down

Alt + up/down arrow

Copy selected lines up/down

Alt + Shift + up/down arrow

Bring up refactoring menu

Alt + Opt + T

Insert WOComponent

Opt + 6

Rename WOComponent

Opt + 2 then R