theresandy - 5:05 am on Aug 26, 2006 (gmt 0)

I just started out with PPC and run a couple of successful campaigns, now I want to optimize it even more.

So my question is, son AdWords, hould I even bother coming up with a big list of keywords related to a primary keyword?

For example, supposed those are my main keywords:
widget
widgets
"buy widget"
"buy widgets"

Should I even bother about these:
"blue widget"
"yellow widget"
"big green widget"
"whatever widget"

Or are they already covered by "widget" and "widgets" on the main list?

Thanks in advance