I had basic brushes and rolls down, thanks to Corey Basso and Skippy. But it wasn't until I became a bench-warmer for Stanford Ultimate that I jumped to the next level with these skills by brushing and rolling on the sidelines. Thanks to Laerbs for this article Top Advanced Catches Foot Work Learn to let the disc do all the work. What I mean by that is to use your feet in order to get to the disc. If the disc is coming right at you after a couple of spins you know that you've got to get out of the way in order to complete the catch.
Every catch has a window.
By simply jumping to one side you've know opened up the catching window. An under the leg catch has a big window. An Oliver has a very small window. Learn how big those windows are and practice getting your body in position to open them up. A great drill is to stand by your self and work on every basic catch.