What makes a successful landing page, typically making the layout page relatively clear and simple, putting the form high on the page so people can find it and see it, are basics for getting the most out of your landing page. What you also want to do for landing pages and conversion elements on your website is track and experiment in order to get better results.
Sitefinity dynamic form builder can be used to create registrations, surveys, and questionnaires. The images show part of a newsletter registration during design and submitted responses stored in the database which allows you to experiment as quickly as you can and as often as you can.
Sitefinity Form Builder

Newsletter Form after Styling

Form response data is retained even after fields are removed in experiments.

Not Getting the Expected Call to Action
Make it Easy to Measure Results
ClickTale allows you to view Flash movies of your visitors browsing sessions. You can see how far people scroll down your pages, how they interact with your forms, and many other aspects of their visit by watching actual browser behaviour.
There are obviously some security issues before integrating for clients see Sensitive Data for details.
ClickTale requires you to block all sensitive information including credit card and banking info, heavens forbid your Laptop is stolen with a directory full of flash files with everyones purchase transactions. After reading the requirements it is easy to update in Sitefinity as css classes can be set for all controls and additional code added to the custom widget that renders the ClickTale Javascipt.
Just two tips for SEO strategy in the future.