Ctrl+N - Open class (ClassName:40 → go to line 40 in ClassName-class)
Ctrl+Shift+Alt+N - Symbol lookup
Shift+Shift - Search everywhere. Tab → jump between sections
Ctrl+E - Recent files
Alt+1 - Project window
Ctrl+Shift+F12 - Hide(or Restore) All Windows
Alt+Enter - Inject language
Ctrl+P - Get Parameter Info
Alt+/ - Cyclic completion
Ctrl+Alt+T - Surround with
Ctrl+H - Type hierarchy
Alt+Home - Show Navigation Bar
Ctrl+Shift+A - Find Action
Right click on object → View as → Create…
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Save Actions plugin - allows to do defined actions on every file save (e.g. format code, sort XML etc. )