Simple text substitution in OS X using keyboard shortcut
The easiest way would be to use Autocorrect shortcuts:


Go to System Preferences > Keyboard > Text
Replace: [[[ with: résumé
(Make sure "correct spelling automatically" is checked)


The character combination [[[ is just an example. Everytime I type [[[ it's automatically replaced with résumé. This applies system wide. You can use any set of not often used character(s). It functions as a keyboard shortcut.