Another topic we visit pretty frequently here is different digital effects tips and tutorials (including those that mix physical and digital work). So I thought that they should get compiled for future reference too!
Combining painted pieces into digital imagery
Free online photo editor - Canva
Digital line art methods
Achieving sepia tones
Poster edges in Photoshop
Expanded squares
Old linen postcard look for your photos
Using the pointillism filter in Photoshop
Duotone prints with Photoshop
Van Gogh style flowers
Fractured photographs
A spooky tree - playing with layers
Hand-tinted prints with Photoshop
Adding a shadow with Photoshop
Photoshop border with a burned edge
Combining cartoon and vintage imagery
Creating a glowing blurred border
Tesselation tool online
Graphic style florals
Messing around with curves
Mixed media piece with watercolor background
Combining texture shots into a new image
Making a layered digital collage
Mixing digital and physical art
Digital manipulation with a torn landscape
"Match color" in Photoshop
Black and white conversion methods with Photoshop
Pop art with Photoshop
How to make a digital Polaroid image transfer
Infrared with Photoshop
Cyanotypes with Photoshop
How to create a peaceful landscape
Making a digital stamp
How to digitally create "fuzzy memories"
Creating a digital mixed media collage
Using a gradient fill
Encased tissue paper
Multiplying your color options
Digital collage using scanned background papers
Adding an embossed layer to your photos
Gaussian blur
A photographic collage
Transparent digital backgrounds