How to make pixel art in Adobe Photoshop.
Step 1: File>New
Set your new canvas to the following settings.
Width: 50 pixels
Height: 50 pixels
Color Mode: >>> 8 bit
Step 2: Pencil Tool + Outlines
Using the Pencil Tool at 1px, start to draw!
Like any drawing, we want to get an outline of our product.
Be sure you are NOT using the paint brush, the paint brush will fill unwanted pixel cells with shades of the color you are using.
Step 3: Color, Shading
Much like a painting, you should have an idea where a light source is coming from.
Step 4: Exporting the Finished Pixel Art
Once you are satisfied with your pixel art, go File>Save for Web.
This will open up a another window. Choose the top right panel that says "GIF", then click save.
Your finished pixel art will be very small, if you want to make it larger change the image size in the save for web panel.