I work in the travel industry as a developer and my current task is to make our booking engine more "bookingcom-like" (yes, this is exactly how the requirements were formulated by product management).
To achieve this task I did a small research of other travel web sites and I realised that most of them added such psychological elements lately.
Today I found this gold article and forwarded it to the product managers, hehe :)
If not program, getting a better idea of the constraints of the final application / website would be a start.
For example, learning that web fonts render differently in each browser (so, even if the desktop font looks great in Photoshop, it might not be readable enough in the real application), or the concept of fallback fonts, could be an eye opener for more traditional designers that only deal with static mockups.
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