Picture of Origami Bases and Basics
This is the first in a hopefully long series about origami. This is written as a reference for beginners, so if you are advanced or intermediate, please come here if you don't understand something in one of my models. In Bases and Basics, I will teach about various folds and ways to start models, some of which even start other bases. I am open to any questions, comments, or suggestions that you may have. 
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Step 1: The Squash Fold

To do this, you simply press where needed and shape the paper into the shape you want. To illustrate this, I showed the example of the fox puppet.

Step 2: The Inside Reverse Fold and the Outside Reverse Fold

In this, I will make a beak and a tail.

Step 3: The Blintz Base

Picture of The Blintz Base
This one's easy. You fold and unfold to make an "X", and then fold the corners into the center.

Step 4: The Square Base

This one will be one of the most commonly used bases. You fold and unfold to make a cross, or a "t", and then you flip it over, fold on the diagonal, which will be opposite to the "t", and then you flip back over and collapse on the lines by taking the right and left corners and basically move them so that they're side by side on the bottom. It took a while for me to figure it out on my own. You're lucky, you have help.

Step 5: The Water-bomb Base

Picture of The Water-bomb Base
This is similar to the square base, but instead of making a "t", you will make an "X". Then you flip it over to make a square, fold a line parallel to the edges, flip back over and "collapse on existing creases".