By the way, if you don't like targeted advertising, as I don't, you can visit Google's ad preferences site and opt out. But it's probably better to give bogus interests than to opt out, because it reveals less information. For example, I selected things I wasn't remotely interested in ("Football", "Nails Screws & Fasteners", "Payroll Services"). The less attractive "targeted" ads are to me, the better.
(Not opting out means that Google will still build a profile of your interests over time, so you may need to repeat this process. But I don't think it's any good at doing that, particularly if you poison the well as above, so I shouldn't worry.)