I tried out the "Trader Joe's Guacamole Kit" this past weekend. Its a great idea - buy one item and get all you need to make fresh guacamole:
I opened it up and surveyed the contents:
- One roma tomato
- Two avocados
- One jalepeno pepper
- Two cloves of garlic
- One onion
- One lime
Then I got busy with the preparation... basically chop everything up into small pieces (except the lime - just squeeze it for the juice) and mix it up.

All done:

This guacamole was pretty good - but it was way too spicy. I should have only put in half the pepper, half the onion, and only one clove of garlic.
Hehe, I though the banana was part of the kit at first.
I like to put cilantro in my guac. It adds great flavor, and is a natural chelator.