To get the most bang for your buck, look to the Bundles section under Sales. Here, you'll find many of the materials you're looking for within the same price listing. On top of that, the bundles are often discounted as well. When bundles go on sale, you can often save up to 50% on Cricut machines, materials, and accessories. Plus, Cricut promo codes do apply to select bundles, so always make sure you're checking.
Cricut bundles come most in hand when you don't have the time to go through each individual product. This option eliminates much of the mindless scrolling you would otherwise do.