Sometimes we do not know what to write inspite of many things to write about. We have a mental block, but what I do is write in advance possible titles for my next articles. Just it pops out of my mind, I need to write it down. I try to find other ways to get more ideas, here are things you can try:
Read blogs around the Internet – getting fresh ideas outside will give you more ides to write. There are a number of good blogs to explore and learn from.
Ordinary stories from your friends, you can write life lessons that you heard from others.
Explore Twitter, it is one of the best source of ideas. There are many good content shared on Twitter, you just need to know what is good and what is not (trash tweets). You should have right keywords to get the results you want.
Browse your photo collections.