I have a problem with not being able to move from idea to execution. By idea, I mean a detailed, specific plan on what to do and how to do it. I make lots of plans, but rarely follow through with them, often times not even starting. I just feel unable to start working.
For example, take college exams. In college, specially during the end, I would read the question paper, and start thinking about how I'd answer each question, and which questions would I pick if there were a choice, and so on. This is normal for a lot of people, but with me, I'd spend upto a third of the allotted time in this. And then when I'd finally start answering, I'd do the same to each question. Often times I'd have the perfect(or a really good) answer in my head, but when I'd start writing it down, I'd forget the good bits, and this would lead to sub standard answers.
I do the same to my personal projects, and to other things like say, writing a blog post, or even writing this question. I obsess over details, and things that are many steps ahead of where I need to be to start working. I'd go online and research about how to solve problems that I haven't even run into yet. But after all that is done, I still can't get myself upto starting work. It feels tiring to start executing my plans, as if it were a big mental effort to plan everything and now I need a break.
It doesn't help that I have multiple ideas, and that my mind is racing off in many different directions at the same time, jumping from thought to thought, when I try and sit down to work.
Are there any good techniques that I could apply and improve my productivity?