In Corel Painter 8 im currently addicted to (and really over-using >:] )
the salt tool, which sprinkles white fade dots about <33 Prettyyy~
http://i5.photobucket.com/albums/y154/Takase_ki/avaloncolourclean.jpgtheres an example of use of the salt tool. In use with other techniques, it can look really effective ( :
...theres a better example:

btw, that pic was all originally orange/gold. Fiddling with the
brightness and contrast can sometimes really effectively change the whole tone of the pic
Aaaand, many people colour very traditional and neat. Sometimes i just sploosh colour on the page and i think it looks ok being messy : ) Those two images above are done just messy n_n;
See look~ heres the first image without its lineart
surprised http://i5.photobucket.com/albums/y154/Takase_ki/avaloncolourglass.jpg messymessymessy
Experiment and try new things~ thats how you develop your own style, and progress. <_< in my opinion, anyway..
On a side note,
Heres a link to a paintchat i visit sometimes, in case you're interested :3
http://tohopchat.homeftp.org:5873/entrance_pro.htmlI find it works better in some browsers than others.