Reading a list won't make them stick. ShortcutFoo has you type each shortcut, then brings it back just before you'd forget it.
Essentials I
7 shortcuts- ⌘CCopy
- ⌘XCut
- ⌘VPaste
- ⌘⇧VPaste values only
- ⌘ZUndo
- ⌘YRedo
- ⌘FFind in sheet
Essentials II
6 shortcuts- ⌘⇧HFind and replace
- ⌘ASelect all
- ^SPACESelect column
- ⇧SPACESelect row
- ⌘BBold
- ⌘/Show keyboard shortcuts
Formatting I
7 shortcuts- ⌘IItalic
- ⌘UUnderline
- ⌘⇧XStrikethrough
- ⌘⇧ECenter align
- ⌘⇧LLeft align
- ⌘⇧RRight align
- ⌘\Clear formatting
Formatting II
7 shortcuts- ⌘KInsert link
- ^⇧!Format as decimal
- ^⇧@Format as time
- ^⇧#Format as date
- ^⇧$Format as currency
- ^⇧%Format as percentage
- ^⇧^Format as exponent
Navigation I
6 shortcuts- HOMEMove to beginning of row
- ENDMove to end of row
- ⌘HOMEMove to beginning of sheet
- ⌘ENDMove to end of sheet
- ⌘BACKSPACEScroll to active cell
- ⌥DOWNMove to next sheet
Navigation II
6 shortcuts- ⌥UPMove to previous sheet
- ⌥⇧KDisplay list of sheets
- ⌥↵Open hyperlink
- ^GGo to range
- ⌥/Open tool finder
- ⌥⇧QMove to quicksum
Data entry I
4 shortcuts- ⌘DFill down
- ⌘RFill right
- ⌘↵Fill range
- ⌘;Insert date
Data entry II
4 shortcuts- ⌘⇧:Insert time
- ⌘⌥⇧:Insert date and time
- ⇧F11Insert new sheet
- ⌘⌥TConvert range to table
Rows and columns I
6 shortcuts- ⌘⌥=Open insert menu
- ⌘⌥-Open delete menu
- ^⌥IRBInsert rows below
- ^⌥ICOInsert columns to the right
- ⌘⌥9Hide row
- ⌘⇧(Unhide row
Rows and columns II
6 shortcuts- ⌘⌥0Hide column
- ⌘⇧)Unhide column
- ⌥⇧RIGHTGroup rows or columns
- ⌥⇧LEFTUngroup rows or columns
- ⌥⇧DOWNExpand grouped rows or columns
- ⌥⇧UPCollapse grouped rows or columns
Formulas I
5 shortcuts- ^⇧`Show all formulas
- ⌘⇧↵Insert array formula
- ⌘ECollapse an expanded array formula
- ⇧F1Show or hide formula help
- F1Toggle full or compact formula help
Formulas II
5 shortcuts- F4Toggle absolute and relative references
- F9Toggle formula result previews
- F2Toggle formula range selection
- ^⌥DOWNMake the formula bar taller
- ^⌥UPMake the formula bar shorter
Menus and panels I
5 shortcuts- ^⌥FOpen the File menu
- ^⌥EOpen the Edit menu
- ^⌥VOpen the View menu
- ^⌥IOpen the Insert menu
- ^⌥OOpen the Format menu
Menus and panels II
5 shortcuts- ^⌥DOpen the Data menu
- ^⌥TOpen the Tools menu
- ⌘⇧|Open the context menu
- ⌘⌥⇧IOpen Explore
- ⌘⌥⇧HOpen version history
Comments and notes I
5 shortcuts- ⇧F2Insert or edit a note
- ⌘⌥MInsert or edit a comment
- ⌘⌥⇧AOpen comment discussion thread
- ⌘^E⌘^CEnter the current comment
- ⌘^P⌘^CMove to the previous comment
Comments and notes II
5 shortcuts- RReply to the selected comment
- JJump to the next selected comment
- KJump to the previous selected comment
- EResolve the selected comment
- UExit the selected comment
Achievement unlocked