While developing sites it’s common to save the code, switch to the web page and auto refresh. Found this little nugget hidden in some tuts I had saved. There’s a little known meta tag you can add to the head of your document called http-equiv. It will refresh the page based on how many seconds you set it to.
Here’s how it looks:
<meta http-equiv="refresh" content="30" />
For more info you can check out the W3C info here.
If your using textmate theres also a hotkey shortcut you can use “command + R”.