You use photos for your blog, articles, social media, and illustrations in your books. Could you create those photos and maybe even sell them to others?
Confessions of a Drop-Shadow Addict describes the use–and overuse–of the special effect that makes type or objects appear to hover over a background
How to Make a PDF Book That’s Realistic using Adobe Acrobat Pro and Adobe InDesign and Photoshop for book reviews, galley proofs, proofreading and other uses
The Art of Illusion: Creating Book Cover Art for Joanna Penn’s Pentecost. Shows how layers of artwork are combined in Photoshop to create the final art, using gradients and blending methods to achieve atmosphere.