If there were we'd all be rich luv.
One, rather unconventional approach, which works on most addictions (alcohol, tobacco etc) is to get in everything you really like and absolutely stuff yourself to the point where you're sick.
'Expelling the evil spirit', as it were. Then take that marker point as the 'fresh start'.
Often it's part of the daily grind that we just live alongside our addictions. A magical approach to that is to bring about the personification of the addiction, or the emotion, or the <insert whatever> so that you are dealing with an actual entity. This isn't always easy though and can lead to psychological nutterism that gets your friends and family nudging each other and whispering when you leave the room

A proper binge-out that ends in decisive expulsion of the gunk and a cold shower is a good marker. We've (most of us) done it with drink, I've done it with fags - induced illness is actually a shamanic technique - I'm not saying 'become bulimic'. I'm saying bring the issue to the forefront of your psyche and hten...well, sick it up

The other one is to get a copy of Beginners Guide to Fasting, book a week off work and do a full-on internal retreat involving a three day controlled fast.
Another marker point. After which your stomach will prefer smaller quantities of food and you've again given yourself a decisive marker from whence to begin a 'fresh start'.
If you return to binging, doesn't matter - do it again. Repetition is fine. It's not punishment, it's spiritualising the physical.
If neither of those appeal, yes - there are rituals you can do to bring about the personification of - well, anything you want really. But it's recommended you have space, Deaf neighbours and holiday owing

If you want to tackle something like this on a magical basis you're looking at setting down a full-on plan for yourself: a course that may last months, maybe years. Is that any harder than how you've been approaching it the past few years? Probably not all totalled up, but it may challenge you and warp your identity a little lol Which is often a good thing - if you don't like who you are at the moment.
You don't do it because you don't want to do it. Usually because:
1) It's comforting to eat
2) You crave the types of food because they taste good and release the happy hormones
3) Food it your 'friend'
4) You don't have anyone you want to do it for
5) You don't actually believe it's possible
6) You're actually happier with the way you are than the way you feel when you're dieting
Any number of reasons. But it's not an easy thing to do even if you want to - so doing it when you don't want to (but because you feel you
have to) is near impossible. Why not just give up and be yourself to be honest? Maybe it is more pleasurable to go from a fried breakfast coronary than to live a long, diet-ridden life?
Anyhoo, you call that a ramble? Fuck woman, it's hardly five lines. You seen what some of us lot waffle on about?