Do not start tomorrow. Do not have a "last supper". Do not wait until you have more time. Start right now! Didn't eat a good breakfast? It doesn't matter - time to start tracking and planning your healthy dinner for tonight. You deserve to be feeling better and in control right now.
It is very easy to stop blogging when we aren't doing so well - but it is important to blog even when you're off track. Your Spark friends will support you, and you can look back on those blogs to see what you've pulled yourself out of before.