It's virtually impossible to have too much. Having an abundance of selection knowledge will not make you a great graphic designer any more than having lots of money will make you happy. However, like money, when you do not have enough to meet your needs, it is a lot easier to be unhappy. Money and selection actually do go hand in hand for a professional designer. Mastering selection will go further towards efficient work in a raster program than any other skill.
Efficient work means profit.
Fire up those magic wands and let's improve your bottom line. Wendy Peck is a working Web designer and writer living in NW Ontario, Canada.