As the saying goes, there is more than one way to skin a cat (why are we skinning cats anyway...ew). So there are definitely a few ways to pack a bag. I've done the rolling thing before (see above).
But by far my favorite is the packing cubes (see below).
Packing cubes keep me in my lane and helps me make choices about what to pack and what will and won't fit. We often pack too much, and packing cubes help us stay in our lane and pack what will fit. Then once it's packed, you slam them (neatly) into your suitcase. Even if you buy a few items on your trip they can fit outside of the cubes without causing you to wonder where it will go.