The reason new habits don't stick usually isn't motivation — it's that there's no reliable cue to trigger them. Habit stacking fixes exactly that: you anchor the new habit to one you already do without thinking. "After I pour my morning coffee, I take my vitamins." The existing habit becomes the alarm clock for the new one.
Build them one at a time, though — stack too many at once and the chain snaps. This tracker lets you set up your stacks and tick them off, so you can see which anchors are actually holding and which need rethinking. Just try it: pick one thing you already do daily, bolt one small new habit to it, and track the pair for a fortnight.