Or ... change just YOUR settings and not those for the entire installation by modifying your ~/.bashrc file. Add a line like this:
Notice how I added a personal "$HOME/bin" to my path? That is handy for any power-user to have their scripts available.
The enterprising scripter might want to check if /usr/local was already inside the path before adding. That line above doesn't prevent multiple additions. PATHs can get overly long with duplicates if we aren't careful.