Best thing to do is just DO IT :)

That has to be one of the biggest life lessons I have learned. Do it and try it if you fail or it fails then it fails but at least now you know instead of wondering. Best part is you learn from those failures but you also win from those successes that will come.

I have a feeling that posting more often and at different part of the days is the most beneficial. You are reaching a larger audience overall and unlike twitter it is easy for these people to follow you and keep up to date or look on your profile for other posts you have done.