EDIT: Also, if you have a large hand-sized stylus, use that. IMO FAR easier to tap with than the tiny ass default styli
THIS.
it is so much easier to get it done using this.
i used to just keep going until i wanted to take a break, then i'd write down where i was at on notepad or something.
now i just do 100 at a time and it works for me pretty well.