Keyboard shortcut for "Submit form"

I use a form maybe 100 times a day. I can tab between the fields with no problem but most of the time I don't have to fill out the entire form and would like to submit it without having to touch the mouse and press the bottom button. The other alternative is to whack Tab ten or twelve times through all the fields. Is there a keyboard convention for submitting a form? How could I design this to submit a form from the keyboard?

Some of the form fields are <textarea> so it probably would be good to keep the <Enter> key as a newline character.