Manipulating Determinism

In a world of no free will, but only determinism, imagine this experiment: You put on a ring and while doing so, you tell yourself that from now on, whenever you notice it on your finger, you will stop and mentally evaluate what you are doing at that very moment, based on some goal you want to achieve (like "stop wasting time on procrastination"). It might just change your behaviour, ad get you back on course? Free will might not exist, but somehow by taking on that rig, you have just manipulated your future?

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Afterthought: Ah, but you do not have the choice in coming up with the idea of the ring in the first place, that thought just came to you by itself. You have no choice in whether you put on the ring on or not, you either do or do not. There is no choice. Damn it...