I found a number of interesting Photoshop techniques while I was using it. Unfortunately I don't have Photoshop right now (been using Gimp instead, I'm not as good with it yet as I am with Photoshop), so I can't verify that I got these right. However, some I found interesting:
Stacked gradients1. Get some nice, bright, rainbow gradient with black on both ends
2. Set it to circular
3. Make a gradient on the image (optionally, you can also reverse the gradient)
4. Select all black
5. Repeat 3 to 4 until it looks good
6. If you like, shift the hue back and forth until it looks
really good
Oversharpened1. Clouds
2. Take the sharpen tool and wipe it all over the picture on and on and on until you've maxed it out
The result should look something like the first picture in this thread, only lighter and with some colors. Note that using the sharpen
filter repeatedly will
not have the same effect.
Neat text effect1. Make some black text on a white background
2. Neon glow with a positive radius
3. Select the text (using select color, or alternatively have a selection saved if you like)
4. Neon glow with a negative radius
5. Invert the selection
6. Invert the colors
7. Craquelure (however you spell it)
8. Invert the colors again
I actually liked this one quite a bit, and if I had Photoshop on an computer with Internet access I would have made myself a 'green_meklar' title with it.
Fuzzy glowing ball1. Make everything black
2. Make some white lines of various thicknesses going from one edge to the other, passing through the exact center of the image
3. Radial blur, a lot, in a circle rather than outwards
4. Optionally, add color (blue seems to work best)
I also had another technique which was something like 80 instructions long to make a randomly generated landscape, but I can't even come close to remembering it. Anyway, usually if I want a random landscape I just improvize filters until I get it right. When I do have one, one thing I like to do is put a perspective on it. Although, of course, now I have
Terragen, so I guess using Photoshop (or Gimp) to make random landscapes is a little outdated. ;P