The keyboard shortcut for editing a cell in Excel

• ^-U to edit the cell
• ⇧-alt-Home to select all text
• ⇧-alt-Left to select one word to the left
• ⇧-alt-Right to select one word to the right
• ⇧-alt-Down to select from the current location to the end of the line.

Note that in later versions of Excel, the “Windows” equivalents, made by substituting the alt for control, also work.

Many applications like Terminal also have a menu item like Window > Cycle Through Windows. It stays assigned to ⌘` even if you change the shortcut in the Keyboard & Text Input preferences.

You could add a custom shortcut for Cycle Through Windows in the Application Shortcuts preferences, or disable it with defaults write -g NSUserKeyEquivalents -dict-add "Cycle Through Windows" nul.

You could also force TotalTerminal to use ⌘` by editing ~/Library/Preferences/com.apple.Terminal.plist directly.

<key>ToggleVisor</key>
<dict>
    <key>KeyCode</key>
    <integer>50</integer>
    <key>Modifiers</key>
    <integer>9437184</integer>
</dict>