Add in juice from half a lime (add more if you prefer it more limey).
Dice a tomato, de-seed and finely chop a jalapeno pepper (omit if you dislike spicy foods), and finely chop a 1/4 cup of cilantro. Add the chopped tomato, pepper, and cilantro to the guacamole. Try not to add in too much juice from the chopped tomatoes.
Add in salt to taste. I also added in some chili pepper to give the guacamole a bit more kick, but you can of course omit this!
Mix well, and TADA!
You can enjoy this with paleo crackers or on top of a bunless burger like here: