So, you want to be productive. You have purchased the book Getting Things Done by David Allen and read it completely. You want to implement the things that you have learnt. You are looking for ways to implement it and start searching online for ways to do that. You spend hours and hours searching for and reading articles on productivity and ways to implement it.
There is a saying that goes “Talking does not cook rice”. Similarly searching and reading articles on productivity does not make one productive. You have to find and stick to a system that suits your needs.
Too much of anything is Good for nothing.