save as much as you can small scraps useful in paper piecing and appliqué .
cut 11/2" strips or squares, 21/2" stripes and squares etc up to 10" squares and stripes.
fat quarters, long quarters.
amount of metres suitable for backing .
in other words save all you can afford to purchase as one day you may find money is scarce and you will a stash ready to use.
sorry for the repeat I couldn't find the first one and thought I had forgotten to save to the thread.