You could do "Historic Quote" trivia. Post a quote, 1st person to guess correct wins. If there are no correct answers after a set period of time or set number of guesses, post another quote, but make the answers include more info such as when did they say it, or what movie is it from, etc. to make it a little more challenging.
I love looking at pictures...I would say give everyone till Friday evening to post a picture of the favorite animal or coral or combo of either in thier tank. At whatever time you pick the winner for the photo you like best.
I also like the idea of adding the following:
Then to keep the chain rolling add + if you win you have a wkee to DBTC something yourself.
And my thank you will be to post my favorite quote:
"The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood... who knows great enthusiasms, the great devotions; who spends himself in a worthy cause; who at the best knows in the end the triumph of high achievement, and who at the worst, if he fails, at least fails while daring greatly, so that his place shall never be with those cold and timid souls who know neither victory nor defeat." - TR
Not trying to win the other DBTCs. I just love that particular quote and wanted to share.