>make a new image 500px by 500px
> filter > render > clouds
[img=http://img144.echo.cx/img144/662/10mf.th.jpg]
> liquify ur image (shift+ctrl+x) use all the different liquify tools (swirl, blok etc) until u hav a fairly abstact image
[img][IMG]http://img139.echo.cx/img139/7728/29pp.th.jpg
>now that u hav that, filter > stylize > wind, use the settings: method-wind,direction- from the left
you should hav sumthin a bit like this:
[IMG]http://img139.echo.cx/img139/2087/36zt.th.jpg
> now, image > rotate canvas > 90 degrees CW
you'll end up with this, sumthin i think looks abit like sum kind of abstract cliff landscape or sumthin

u can use it on other stuff aswell, like this lightning thing i made

not the best tut, but it is my first, so tell me wot ya think plz