How to win the World Memory Championship

I need some kind of new strategy if I'm going to win it again. I haven't really improved at all over the last couple of years, or not by enough, anyway. I didn't even beat a single personal best at this year's WMC. I've still got the edge over everyone else in the cards and binary, but that's just because my system is so much better than everyone else's (I'm trying not to be modest, because it's non-English), and when other memorisers have successfully adopted a Ben-style-system and practiced it a bit, they'll catch up with me.

I could get better scores if I practiced some more, but I lack the motivation. I really need to develop new and better techniques - a four-digit-per-image system would really boost my scores on the numbers, but I can't get my head around a good way to do it. And what clever things could I do with cards to make my system even better? There must be something, I don't claim to have come up with the greatest system it's possible to have... (just the greatest system that anybody's got right now! To heck with modesty, let's call it the Ben System with capital letters and boast about how great it is, while I still can! I'm the best!)