A lot of the ideas are obvious, but the obvious isn’t always obvious, particularly when there are other design constraints. Of course, colour and size get a mention, but did you know there is even a law to back this up; this Fitt’s Law – http://bit.ly/AxYIIS – states that:
“The time required to rapidly move to a target area is a function of the distance to the target and the size of the target”.
I also enjoyed the snippet that showed that buttons with arrows encourage more clicks than those that don’t – collectively these small tweaks can make a difference. Another “old chestnut”, showing the value of the click to the clicker is also covered in the how not to do it section.