With plaintext files, when I reopen them in Vim to add content, I want to go to the end of the last line of content and get to insert mode. In ideal circumstances, a simple GA after opening the file would take care of this. Unfortunately, I have the habit of adding a few extra newlines at the end of the file, and it's proving a hard habit to get rid of.
Given this, what is the simplest way in Vim of saying "go to the last line in the file that has content in it, go to the end of that line and get into insert mode"? I guess the crux of my question is, how do I express the concept of "last line that has content in it" to Vim?