Web Analytics: Starting From The "End"

Many people think about analytics as something to be done after you have started a campaign, launched a new site, or created anything online. I think the opposite should always be done, unless you are launching a new site, where you don't have any data to base your decisions on. The new site case is probably the only one where you should look at analytics afterwards.
Traditionally, any marketing initiative (well... ideally!) would be preceded by research, to make sure the message is right, the offering resonates with people, and to get a feel of how the market will react to whatever is offered. I don't see any reason why this shouldn't be done online, especially that we have massively more data, charts, and trends about almost any kind of activity on our sites. Web analytics is more than research, it is real usage about what people are actually doing, and not just statements of preference that might not describe what people will actually do once they see your actual product. It is research in motion (I like the company's name!)
CPC campaigns: Before starting keyword research and deciding what users to target, you should check what is actually working on your site and target those pages / sections. Starting with landing pages that have great conversion rates and bounce rates is an easily predictable process since you know they are actually working fine.
SEO: Your site probably gets some (or lots) of SEO traffic. Your SEO keywords are probably not all at number one on search results. Working on improving their position is much easier, more effective, and efficient than targeting new keywords. If search engines already trust your pages for certain keywords, you should work on improving the trust and getting much more traffic. Remember Zipf's Law, you will almost double your traffic per keyword, for every step improvement on search results.
Email Marketing, creating new section on the site, online PR: the same concept applies.
See what is working, build on that, and then work on getting new markets.
The job title "web analyst" assumes the person is "just analyzing", but potentially that analysis can lead to very important decisions, and it can become consulting for the company's business and not just the website.