acky

While these are good guidelines, I came to the conclusion that life's too short to spend so much mental energy on this. If your devices need to be charged - charge them. That's it, that's the only rule.

Not to my knowledge. However, there are countries that allow you to have an overlap of a masters and phd (or shorten the masters and begin the phd early). For example: Germany - https://www.academics.de/ratgeber/master-und-promotion-gleic...