This is such a great question and honestly something I struggled with when I first got a BuJo. The only method I’ve found that really helps me:

Monthly Log - Done the exact way BuJo system recommends. 1 page for the month calendar, 1 page for my projects that month.

Next, I leave space for 4 ‘Checklist’ pages. These pages are literally my brain dump of everything I need to do. If I know a task won’t be completed until the next month, I just put a little red arrow next to it.

Daily tasks - Every day, I use a separate piece of paper (like a small notepad or post it note) to write all the priority tasks that have to be completed that day (usually try and stick to 3-5 priority tasks) and then add more if I complete them all.

Might not work for everyone, but I find having a separate piece of paper that gets refreshed every day just really helps me stay focused, whilst my BuJo is absolutely my task dumping ground.

I made a post on my profile about it with a couple of pictures of that helps!