This is a hypothetical question which means, there is no right or wrong answer.
If you choose not to answer no big deal, but I thought it would be interesting to
see what people's wish lists were like.
The question is, If you could spend your money on one thing or one tool to help
you improve your sites organic rankings, what tool would it be? If you have already
done this, what was that tool? and If you have already done this and the tool didn't
work as advertised, what was it.
We're only looking for ones that you would pay for. Not the free ones.

Thanks.

Investing in Directory Submissions really works well for me and Especially Yahoo directory.

Everyone should try Yahoo directory submision and it is the best i have ever seen.