Hi, I´m back!
Yeah, I´ve read that pasting the content of a file into a another new file is good for cleaning up, so I figure this is the way I should proceed: 1) I make a new template, defining all the needed styles, headings etc. 2) clear all formatting in the old file and 3) paste the content of that file into the new template, 4) going through the whole document assigning the styles to the text etc. 5) saving as new file, of course
How does that sound?

Great to know that Happy documenting