Plop cream cheese in a bowl, and mix until smooth.
Add sour cream and taco seasoning, mix until thorougly combined
spread cream cheese mixture evenly on the bottom of an appropriately sized dish
Evenly spread salsa on top of the cream cheese mixture, then top that with the shredded cheese
Put in the fridge for about 30 minutes to let the cream cheese firm up a bit.
You can add the optional ingredients listed above on top of the cheese if that's your thing
Enjoy with tortilla chips