Common SEM Errors - From Whoast

http://www.whoast.com/blog/2008/09/7-common-errors-of-search-engi.php

From Whoast, some of the same things that we've seen in dealing with new clients and their prior forays into Search Engine Marketing. A few of these may be moving targets, depending on your budget, but we've worked with very few clients who come to us with a solid SEM strategy.

Most individual industries also come with their additional set of common errors, which are no less evil than the ones outlined in this piece. Given that SEM has in fact been around for a while (relatively speaking), it's odd to see such errors commonly repeated.

Or not. It's never surprising how often you can be surprised.