Arrow keys
Move one cell up, down, left, or right.
CTRL+arrow key
Move to the edge of the current data region.
HOME
Move to the beginning of the row.
CTRL+HOME
Move to the beginning of the worksheet.
CTRL+END
Move to the last cell on the worksheet, in the bottom-most used row of the rightmost used column.
PAGE DOWN
Move down one screen.
PAGE UP
Move up one screen.
ALT+PAGE DOWN
Move one screen to the right.
ALT+PAGE UP
Move one screen to the left.
F6
Switch to the next pane in a worksheet that has been split (Window menu, Split command).
SHIFT+F6
Switch to the previous pane in a worksheet that has been split.
CTRL+BACKSPACE
Scroll to display the active cell.
F5
Display the Go To dialog box.
SHIFT+F5
Display the Find dialog box.
SHIFT+F4
Repeat the last Find action (same as Find Next).
TAB
Move between unlocked cells on a protected worksheet.

There is a keyboard shortcut for the mouse right click in Excel.
Try Shift+F10

Here is a great tip for people who use number formats a lot. Try selecting a cell with a number and typing CTRL+SHIFT+1 .

This shortcut formats my numbers to #,##0.00 which is the most common number format used where I work.