You do have a limited amount of working memory, so if you pursue ten threads at once, you'll just lose track of what you're doing. But if Thread #1 is your do-my-project thread, and Thread #2 is your save-distraction-for-later thread, you'll do fine.
Seconded. You're already in emacs, and orgmode is excellent (and it should be already there). Spend a day or two learning it, and then use it - you won't regret it.
You do have a limited amount of working memory, so if you pursue ten threads at once, you'll just lose track of what you're doing. But if Thread #1 is your do-my-project thread, and Thread #2 is your save-distraction-for-later thread, you'll do fine.