I can identify with the designer's block. It rears its ugly head every so often even to the best of us.

Remember that creativity, like any other 'strength', is like a muscle that needs to be continously excercised to get stronger. While it doesn't hurt to 'look around' at templates, your best shot at a breakthrough is by thinking more as an artist than a programmer, until you visualize a design. This helps keep both left brain and right brain sharp. Best advice I've heard is start the concept away from the computer, such as drawing on a sketch pad. Then go back to the computer work area and put on the programmer hat to implement the design. It's worked for me.

Best wishes...