This podcast by @CyrusCG and @9thonbreakers is amazing http://topdownlegacy.libsyn.com/episode-9-how-to-prepare-for-a-big-event
I worked hard last year to become a better player and I tried several things that are recommended in this podcast and there are things here that I wish I had done too.
I know some look at Vintage casually and some take it very seriously. I play this game for many reasons and being competitive is part of it. Knowing how to prepare for events was very foreign to me.