>>10,13-14
Unfortunately removing distractions and working are necessary but insufficient conditions for productivity. I've been able to remove a number of distractions entirely such as Youtube, imageboards, and video games through inconvenience like DNS-level blocking and uninstalling. For me I have to remove distractions entirely rather than phase them out, or replace them with some other distraction. These days the main distraction I have to deal with is internet searching, and even this is relatively goal directed most days. Having a separate machine for work without internet has been a great help with this last issue.
Despite this I'm still not exactly productive. I'm frequently ill on account of a diet in desperate need of revision (often too ill to work effectively like today), and I often oscillate between different tasks or focus on the wrong task for the moment, my methodology for taking notes etc. is often also very poor and does not follow the literature. (e.g. taking verbatim notes, and re-reading these notes rather than self-quizzing) Doing the right thing can often even be harder than not doing the wrong thing for me as the right thing often requires thought and action while avoiding distraction only requires distance, inconvenience, or disgust.
Anyway beyond being a sort of journal entry to access my current position I just wanted to comment that more or less improving your productivity is going to depend entirely on what the limiting factor for you is. I find journalling to help a lot, and when I was dealing with distractions a lot I found time logging beneficial. These can give you self awareness so that you know what to correct.