Great designers are the ones who make the best of their tools. There is a hidden form of art that you slowly learn when it comes to the utilization of your resources, and the more you practice, the more restrictions you eliminate.
Take a look at this A4 letterhead mockup created and shared by Jose Fran. It can be used for elegant presentations of logos and branding projects, but it can also be edited to include your artwork from images, photographs, and magazines covers to illustrations and sketches. The mockup coming in 3000 × 2200 pixels resolution at 300 dpi with its customizable background is provided in PSD format, so you can use the smart object layers to easily insert your graphics. You also have control over the shadows that create a realistic presentation. They’re set on separate layers that allow you to edit them and to adjust their intensity.