Chasing Moments Photography

Tutorial: How to add frames and borders to your images in photoshop 

Step-by-step summary:

1. Decide on your preferred output size (if you are adding borders for printing) and set the dimensions of your crop tool OR crop down to your favorite composition (for display on the web). Don't crop too tight as you'd need some extra space for the borders.

2. Create a new layer

3. Fill the new layer with your preferred border color.

4. Keeping the new layer active, make a rectangular selection using the marquee tool and detele it.

5. Flatten the image. Voi la. 

Read the detailed tutorial with visual hints here.