The title is pretty self-explanatory. Write down about what are you thinking at this very moment.

As for me, I have an urge to smoke. I shouldn't but I want to. This is frustrating.

I am thinking of writing something in reply to your post.
So here goes:

Something (capitalized version)
something (just the regular version)

Now I'm thinking of clicking on the "add reply" tab.

So I will.