This has pretty well been said already but back in the days before internet and "copy and paste", I used to write out the words from a recording - usually every second line, then back to the beginning and fill in the missing lines. What I had was very much a scribble so I'd go back to the beginning and do a more legible job of writing, or typing, the whole thing. I usually found that by that time I had learnt the words. That when the real work started with getting to know, and feel, the song!

Eddie