Can help from experienced scientists (grant laureates) make the difference? The answer seems to be almost too obvious. Contact potential mentors, even if they appear highly intimidating to you!
Are you an expert on budgets, intellectual property protection, marketing or other non-scientific tasks? Or do you want to become such an expert? Probably not. So seek some coaching to save time and equally advance the quality of your proposal! But where do you find these people?
How about training on the job? You simply write, submit, fail, learn, revise, re-submit, and so on. This is an extensive and painful training program! Taking tailored courses may help you speed up the process.