I tweet in English the day before yesterday, and figured out 140 letters is too short to express on the twitter!
For the example....
Today was pretty good day. I went to the farmer's market and got a lot of veggies. Then, I took a nap on my couch and I had a sweet dream.
Even I consider my English level, obviously, English needs more letters to express. hhhh, that's why twitter is so popular in Japan.
And look over English tweet, yes, they are very simple and easy to read.