Spoken like someone who cares.

Just write about whatever is around you, something you've done in the past, a trip, something you are doing in the present maybe your hobby, something your are interested in sports, your favorite play, poem or book.

If you can't think of anything off the top of your head, just read other peoples' post and tell them what you think about whatever they posted (be kind). If you stay engaged long enough, let your imagination go and don't worry what other people might think inspiration will find you.