I agree with Walker. It's discipline and practice.

One of the problems I encounter is that soft-field techniques on a paved runway are somewhat artificial. The way I get around it with my students is to point out that soft fields are not the only place that you'll use the technique. You might, for example, use both the takeoff and landing techniques on snowy and slushy hard runways. A modified soft-field takeoff technique is sometimes used for very high density altitude takeoffs (to get wheel friction the runway out of the picture). And a soft field landing technique would be used if you had concerns about your nosewheel or tire.

Sometimes giving it a different outlook helps with working on the technique. I try to make it a game - can you to a touch & go without having the nosewheel touch at all?

Sorry I can't be more specific about what to do - without seeing you in flight, can't really tell where your difficulty lies.