I experience self control issues on a fairly regular basis. Computer, phone, daydreams, etc. I'm just recently keeping bad sleep habits at bay (usually, still occasionally let the lure of the shiny keep me up). On a solution-level, I've found that exercise + proper rest tends to have the greatest singular impact on my self control. My willpower tends to scale with my energy-levels. In addition, adding little obstacle…
What percentage of that is phone and computer related? If you were unable to visit particular sites (maybe during particular timeslots), how much would that solve the problem? What other things could solve the problem without changing your actual habit?
I'm also just bad at quantifying anything as a whole. I generally have trouble getting distracted whenever important things aren't attention-grabbing and shiny things are few clicks or taps away...