I can't count how many "techniques" I came up with myself over the years. Enthusiastic, convinced and most importantly, of course, not successful. Motivated, getting-things-done people don't have some secret methodology, they have enough dopamine to take a risk in energy expenditure. You know which totally secret behavior will increase productivity? Taking a pill of amphetamine every morning.
Not saying y'all got ADHD, but there is a spectrum and it's not bullshit. If you constantly feel the need to explode tasks and compulsively need to get to the "root" of the problem, thoroughly prepare each new project, but got a hard time actually starting (or finishing) anything... Another guide is not your solution.
You need to learn to endure the unfair pain of extra boredom and the feeling (self)stimulatory deprivation; help your brain to dopamine with diet, with timing sugar and frequently exercise. Or get ADHD diagnostic, if things were like this since childhood and you always struggled. <3