Shortcuts:

• Ctrl-D/Cmd-D: fill the selected cell with the content of the cell above;
• Ctrl-G: “go to” any area;
• Ctrl-K/Cmd-K: insert hyperlink;
• Ctrl-L: define name for cell range;
• Ctrl-R/Cmd-R: fill the selected cell with the content of the cell on the left;
• Ctrl-;: enter the current date in a cell;
• Cmd-;: enter the current time in a cell;