I had the same issue for years, and silly little thing that has helped me a lot is that I put a reminder in my calendar that simply says "Just because you stopped using a system, doesn't mean the system is bad". That's enough to prompt me to 'get back on the horse' when I fall off versus spending a week looking for a better horse.

On balance, this shift in my attitude means I definitely use more simple organizational tools more often than I did in the past, and that has certainly helped my productivity.