1.     Ctrl + N: To create a new workbook.
2.     Ctrl + O: To open a saved workbook.
3.     Ctrl + S: To save a workbook.
4.     Ctrl + A: To select all the contents in a workbook.
5.     Ctrl + B: To turn highlighted cells bold.
6.     Ctrl + C: To copy cells that are highlighted.
7.     Ctrl + D: To fill the selected cell with the content of the cell right above.
8.     Ctrl + F: To search for anything in a workbook.
9.     Ctrl + G: To jump to a certain area with a single command.
10.   Ctrl + H: To find and replace cell contents.
11.   Ctrl + I: To italicise cell contents.
12.   Ctrl + K: To insert a hyperlink in a cell.
13.   Ctrl + L: To open the create table dialog box.
14.   Ctrl + P: To print a workbook.
15.   Ctrl + R: To fill the selected cell with the content of the cell on the left.
16.   Ctrl + U: To underline highlighted cells.
17.   Ctrl + V: To paste anything that was copied.
18.   Ctrl + W: To close your current workbook.
19.   Ctrl + Z: To undo the last action.
20.   Ctrl + 1: To format the cell contents.
21.   Ctrl + 5: To put a strike through in a cell.
22.   Ctrl + 8: To show the outline symbols.
23.   Ctrl + 9: To hide a row.
24.   Ctrl + 0: To hide a column.
25.   Ctrl + Shift + :: To enter the current time in a cell.
26.   Ctrl + ;: To enter the current date in a cell.
27.   Ctrl + `: To change the view from displaying cell values to formulas.
28.   Ctrl + ‘: To copy the formula from the cell above.
29.   Ctrl + -: To delete columns or rows.
30.   Ctrl + Shift + =: To insert columns and rows.
31.   Ctrl + Shift + ~: To switch between displaying Excel formulas or their values in cell.
32.   Ctrl + Shift + @: To apply time formatting.
33.   Ctrl + Shift + !: To apply comma formatting.
34.   Ctrl + Shift + $: To apply currency formatting.
35.   Ctrl + Shift + #: To apply date formatting.
36.   Ctrl + Shift + %: To apply percentage formatting.
37.   Ctrl + Shift + &: To place borders around the selected cells.
38.   Ctrl + Shift + _: To remove a border.
39.   Ctrl + -: To delete a selected row or column.
40.   Ctrl + Spacebar: To select an entire column.
41.   Ctrl + Shift + Spacebar: To select an entire workbook.
42.   Ctrl + Home: To redirect to cell A1.
43.   Ctrl + Shift + Tab: To switch to the previous workbook.
44.   Ctrl + Shift + F: To open the fonts menu under format cells.
45.   Ctrl + Shift + O: To select the cells containing comments.
46.   Ctrl + Drag: To drag and copy a cell or to a duplicate worksheet.
47.   Ctrl + Shift + Drag: To drag and insert copy.
48.   Ctrl + Up arrow: To go to the top most cell in a current column.
49.   Ctrl + Down arrow: To jump to the last cell in a current column.
50.   Ctrl + Right arrow: To go to the last cell in a selected row.