[userium]

I would also add usability to the already mentioned tactics. Usability testing helps you to understand what people really want, thus making you a better marketer.

In addition to testing your own site, you can also do a usability test for your competitor's site. You might find some interesting marketing ideas that way. :)

Here is a free usability checklist for websites: https://userium.com/ And services like e.g. usertesting.com are great for getting feedback from users.