In keeping with your list idea, here is a list of things you could possibly write about. Top ten:

-favourite posts that you have seen today
-strange animals, most awesome foods
-foods that so shouldn't be food
-best pictures you've seen so far on Steemit
-places you'd like to visit
-reasons why Steemit is amazing
-hilarious memes
-reasons that you joined Steemit
-best recipes that you have seen on Steemit
-books that you love

Basically anything related to animals or food is pretty straightforward if you are looking to jump start some inspiration. It's also good to look at what other people are doing and promote those things. Making inspirational lists of the best things you've seen on Steemit could be great.

Have lost of fun with your challenge!