Self-Indication Solves Time-Asymmetry

Basically, he's saying that universes which have a definite direction of time are much more likely to be very large and long-lasting, and have many more opportunities for "observers" (like us, or our particles, depending on whether you've read http://www.sciencenews.org/view/generic/id/35391/title/Do_su... ) to exist, than those which do not have a definite, reliable direction of time.

And therefore, because we exist, we are much more likely to find ourselves in one of those kinds of universes than in one which is not so compatible with life.

This is probably not the most interesting article I've read on OvercomingBias... the others usually make more interesting arguments.

There are several time arrows, expansion of the universe, entropy increase, and your perception of future and the past. The last two are not independent at all, as your perception of the past is based on the memory which in turn is a chemical process that follows entropy increase. So the answer to "why things do not happen backwards in time more often" is that because your perception of direction of time is always aligned with the entropy increase.