New design challenge.

I've been wondering for a while now if I should do another 30-day design challenge. I do these types of challenges to push my creativity to the limit so that I can learn new tricks. Starting the challenge is the hardest part of all due to the fact that I need to think about the different themes I want to create. Does anyone have any suggestions as to how I should get started or suggest the themes I can use. I would also think about filming the whole design aspect of it all which could be fun in the end.

Maybe I could add some photography to the mix. I'm really lost at this point.