I'm a big believer in the notion that something will always come out of nothing. You might stare at that blank page, the sheet empty of ideas, but if you stare hard enough, and are proactive enough, then I can guarentee that things will formulate and start to move along. Like the quote says above, hold on to the original vision, and trust that the process in which you achieve the vision was supposed to be completed in that way for a reason.
I'm not just applying this to my university work of course, I'm too much of a big dreamer to limit this idea to just one thing. It's as much about the journey towards the end result, than it is the actual result itself.
Have a fabulous weekend :-)