Lisa Raehsler takes a stab at putting together a list of paid-search New Year's resolutions that she believes other marketers should consider. Most of the tips are common sense, but marketers should especially pay attention to No. 5. Similar to a stock portfolio, marketers should diversify and not keep all their brand's eggs in one basket. She writes: "Addicted to AdWords? YouTube, Yahoo/Bing, LinkedIn, and Facebook have all made improvements this past year."