I think a lot of this is down to too much choice. There are many papers on this in psychology, but for example, from [1]: "Findings from 3 experimental studies starkly challenge this implicit assumption that having more choices is necessarily more intrinsically motivating than having fewer. These experiments, which were conducted in both field and laboratory settings, show that people are more likely to purchase gour…
Computers can do great, but I think it required some thinking about what you want to accomplish and how a computer can help. Then tailor your computer usage to that. For writing, you may want something like nano/notepad or the full word processor experience. But don’t use one when what you need is the other.
Choosing may be difficult, but a period of reflection will help tremendously.