I save money and space in my traincase by purchasing the select cover-ups rather than an entire foundation. I make sure to get a few of the lightest and darkest in both the NW's and NC's. I think the NW's are better for contouring. These have good coverage plus they can be mixed with different products to give a different finish (ex: Moisturegleam, Strobe Cream, Moisture Fix). Plus, if you get full size you risk that you will not use the entire product during its shelf life. If you find that you tend to reach for the same foundations more than others, you might want to have back ups. I also think the peach correcteur is a gorgeous product that should be in every artist's kit. At $13.50 a pop it isn't difficult to get nearly all the shades. That's just what I do...I'm sure everyone has some great suggestions.