I used the following but depends on what ever you are using (Cotbed/Crib/Moses Basket)
2/3 Fitted sheets
3/4 (Small - Moses/Crib) Cellular Blankets or larger ones if using a cot
2/3 Fleece Blankets
4 Towels or sheets to use as sicky strips as i call it!
I used to place a towel/sheet across the sheet, where babies head would be, if LO was sick then it was easier to change this than the whole bedding.
I folded in half the small crib blanket, and used to place 2 of these folded on top of Calum and found it easier to remove a blanket if needed rather than complety taken blanket off and replace with a smaller one. All LO's are different with how warm they want to be and to be honest Calum didnt think much to the guidelines on blankets!