After I mix everything for Jim Layhe's No Knead Bread I sometimes refrigerate it, but most of the time I leave it on the counter for 18 hours.

My question is;  

When I do put it in the refrigerator should I put it right in after I mix it or is it better to let it sit on the counter for an hour or two before refrigerating it?  Or does it not matter when you put it in the fridge?

Thanks!