In SEO, many people often think of the different types of SEO tactics that are put into play without ever really putting together a solid strategy. Knowing how to distinguish which tactics should be used for which market is a great skill. It’s something that is not focused on by all SEOs, but it really should be.
Beyond that, after determining which tactics are best, one of the best abilities to have is efficiency at various tasks. Knowing how to balance your time for each need that your projects require is a very valuable asset. Stephan Spencer described it very well in his article on Search Engine Land, I highly recommend viewing his tips on all of these often missed elements of SEO.