Additional rules of thumb: * Avoid single choices. If there's only one possible choice, don't waste the user's time by requiring an action. At most show that t

Additional rules of thumb: * Avoid single choices. If there's only one possible choice, don't waste the user's time by requiring an action. At most show that that value is chosen. * Select the best defaults you possibly can. If some extra coding work allows pre-selecting the right default infor 50% of the users without making it harder for the rest of the users, it's a win. * Remember the user's input. Making the user select the same thing again and again is insulting. * Don't have an explicit setting when an implicit one will do. The width of a panel can be remembered from the last time the user resized it, there doesn't have to be a place to enter a value for it.