I've completely cut out caffeine. I used to drink 3 coffees per day, often Starbucks. The ER staff were having a laugh at my expense a few years ago, because my very first episode of A-fib was triggered by drinking about 40 oz of the strongest Starbucks coffee. I found out later that within an hour I had ingested about 1250 mg of caffeine, equivalent to about a pot of normal coffee. They told me, "You're going to be in here overnight, because that caffeine isn't going to wear off for about 10 hours." So I do still drink coffee, but decaf. I'm thankful that there are more better tasting decaf options out there now, including Starbucks. I'm still working on the sugar thing though.