"I've bought the kit, so I've started"
There's a version of the good fortnight that happens before the first of January, and it's spent in shops. The running shoes. The language app subscription. The notebook for the novel, a good one. The budgeting spreadsheet, set up with colours. The wish is expensive in the last week of December, and the spending feels like the first act of the new life.
Dai, Milkman and Riis's first study was of Google searches for the word diet, and searches rose after landmarks. A search is a small purchase of the picture. It costs nothing and it delivers a moment of the outcome. Kit is the same thing at a higher price. When you buy the shoes you get, for the price of the shoes, an hour or two of being a runner, in the shop, on the walk home, unboxing them by the door. I've no study of this and I'm giving you my reading, but I think buying is the most reliable way to enjoy the picture without doing the Tuesday, because it looks so much like doing.
The trouble is what the kit becomes in February. The shoes by the door were, in the good fortnight, a small pleasure. After the drop they're an accusation. Every time you pass them they say something about you, and the thing they say isn't "go for a run". It's "you're the kind of person who buys the shoes". Which makes the shoes a reason to look away from the door, and the door is where the run starts. The kit that was bought to make the wish easier is now making the Tuesday harder.
I'm not going to tell you not to buy the shoes. Some kit is needed and having it removes a real obstacle. The test is simple. If the thing changes what happens at ten to eight on Tuesday, it's a plan. If it changes how you feel on the twenty-eighth of December, it's the picture. Shoes you'll run in on Tuesday are a plan. A watch that measures a run you don't yet have a Tuesday for is the picture with a strap on.
And if the kit is already there, by the door, being an accusation, here's what to do with it. Take the accusation off it by using it at the least version, once, this week. A ten-minute walk in the running shoes is enough to turn them back into shoes.