Tip no.2: "The Art Look"
1. We know about the 'artistic' filters in PS, but here's a little variation I discovered. Open up a pic in colour of some nice outdoors scene. This is my example:
2. Looks nice, but maybe you want something a little more 'arty'? Ok, duplicate the layer, highlight it in the layers pallette and go to filters in the top menu bar. Scroll down and find stylize > find edges.Click that. This is what you'll have:
3. Interesting but maybe not very subtle? Now go to edit in the top menu bar and scroll to 'fade find edges', click that and up comes a window named Fade, with an opacity bar and below that a 'Mode' tab. Scroll down that and hit 'Multiply' and then click 'OK'. Now you'll have this:

4. Looks a little dark and not quite colourful enough? I'd suggest tweaking the 'Hue/Saturation' and then the 'Brightness/Contrast' until you end up with something like this:
5. Et voila - Something just a little bit unusual!