One of the first things is you have to make a test sheet. This is so you can figure out what kind of design you want to put on the final product. I usually fold three test sheets so I can see how one of the points folds together. For the sake of not taking a billion photos, the test sheet looks like what the normal sheets look like the normal sheets until I get to the design stage.
|Test Sheet (Or just folding a sheet of paper)|
|Sheet Fully Folded|
Below is the actual test sheet. You can see where I tested the dot pattern a few times, experimenting with how and where I want the dots to be placed. I tried a couple of different ideas. Origami paper is thin, so it's important to mark where exactly you need to put your colors on the sheet when it's flat, putting any design on the page when it's flat where it shouldn't be can result in the pattern showing through the paper when it's folded. I had to make sure the dot pattern wouldn't be visible except where I wanted it. Sometimes it's complicated, sometimes it's not. It really depends on the pattern.
|Testing the dot pattern|
|Final dot pattern on one sheet|
|30 sheets of paper, folded and dotted|
|Five star, three triangle. You can see the pattern|
|Inside the ball|
|Outside the ball half finished|