You hopefully already know:
Windows: cntrl + c (copy), cntrl + v (paste), cntrl + z (undo), cntrl + x (cut), cntrl + s (save)
Mac: cmd + c (copy), cmd + v (paste), cmd + z (undo), cmd + x (cut), cmd + s (save)
And now make constant use of:
Eclipse:
Format Code: Cmd + Shift + F
**Save: Cmd + S (on mac)
**Save: Cntrl + S (on windows)
IntelliJ:
Cmd + Option + L