How to choose appropriate design pattern?

What UI design pattern for choice between 2 actions comes to your mind?

• My goal: find optimal UX/UI pattern. Pattern's goal: give a user choice between two actions. Simple example: http://dribbble.com/shots/599154-Choose-Your-Option Here is UX/UI pattern I implemented (30 second video inside):http://www.screencast.com/t/5g7RqlsP9t3 Page details: in my case I had a page where users top up their accounts. There are two ways of doing it: payment (any method) and coupon activation. Please, tell what you think about the design pattern I used on the page. Is it too complex? Is it not obvious? etc.

• Answer:

  The split-screen design with an "or" in the middle is always very clear. However, I believe that whenever possible, ONE clear call to action would be even better. Even if there are two choices, one should be marked "recommended" and/or appear slightly larger. You can choose which one to emphasize based on either usage (What percentage of people coming to the page will have coupons? If it's less than 50%, make the other choice larger.) or goals (emphasize the one you want more people to do.) An additional point: often, a coupon entry field does not have to be very large, as coupon wielders are unlikely to forget to use their coupon. They will seek it out.