Photoshop is a huge, multipurpose program. Because of this, some of the features that can be very helpful for pixel art are somewhat hidden, and not well known. I will try to highlight some of these features in a series of blog posts.
Isometric grids can be very helpful for creating isometric pixel art. They will help you draw straight lines and keep your objects aligned. Here I will teach you how to create your own. Below is an example I drew up in just a few minutes using an isometric grid I created.