Here are some more abstract tips that might apply to more than just Facebook's mentality. 1) Have a clear workflow that matches your business and your user goa

Here are some more abstract tips that might apply to more than just Facebook's mentality. 1) Have a clear workflow that matches your business and your user goals. 2) Make it as short as possible. 3) Don't have dead ends. 4) Make sure 4/5 people in your target market can jump into it and accomplish the task within a few seconds without asking any questions. (This is a good target for a V1 release, V2 and beyond should reach for 9/10 or more) The rest is mostly trend and opinion. Good design is just good HCI -- fast (both quick and understandable) interfaces to complete a task.