Should You Build Links for Competitive Terms or the Long Tail of Search?
Link: Should You Build Links for Competitive Terms or the Long Tail of Search?
Check your stats, see which terms convert, I suggest using hittail which has a built in feature that suggests new keywords based on your long tail traffic patterns (a simply brilliant program designed by Mike Levin). Then you will not waste any time going after the wrong terms which after months yield only marginal results.
