Why does deciding exactly when and where you'll act make you actually do it?
A goal says what you want; an if-then plan says when it happens, and that tiny shift is what gets it done.
An implementation intention is a plan in the form "If situation X happens, then I will do Y." By tying a specific action to a concrete cue - a time, a place, an event - you hand the trigger over to the situation instead of relying on remembering or feeling motivated. When the cue shows up, the action fires almost on its own. Across many studies, people who wrote one of these plans followed through far more often than people who only set the goal.
"I'll study more" rarely survives the week; "When I sit down after dinner, I'll open my notes for 20 minutes" actually puts you in the chair.
Don't just set a goal - decide the exact when and where, in one if-then sentence.
Most things you mean to do don't fail from lack of wanting - they fail because no moment was assigned. Assign the moment and the follow-through mostly takes care of itself.
Goal = what you want. If-then = when it happens. The plan beats the wish.
Learn the idea and practice English at the same time.