Can I store bread dough overnight?
Yes, it is possible, and in fact usually results in better bread, because the yeast has more time to work and develop flavour. It depends on the recipe, but you should usually reduce the amount of yeast being used to prevent overproofing. You can keep most doughs for a couple of days in the fridge, depending again on the amount of yeast and how often the fridge is opened.

Simply mix and knead your dough as normal, cover it tightly with plastic wrap over the bowl, then put it straight in the fridge. You will usually need to allow a couple of hours the next morning for the dough to 'wake up' and finish a full proof, but if your dough has fully risen in the fridge (ie it has grown 1.5-2 times) you can go straight to shaping.