Leave everything out in the corridor that you don't intend to carry off. Keep night wear, and the next days attire plus toilet articles you need and carry them off in a small overnight bag.
You can actually keep as much as you want to carry. But too many large bags can be a hassle on the ramps, the lines can be long, and if you aren't an early departer then you end up in the public areas with your bags stacked around you since they have to clean the cabins for the next cruise.