I've spent a lot of time tuning my reminders. My current setup is working pretty well for me at the moment.
I'm pretty lazy. I'm not really motivated by anything except a red goal that is about to fail catastrophically. That in mind, I only get notifications for goals that are going to derail. And I'm only set to get them pretty late - if I theoretically want to do something at 10am, I set the reminder for 10:15.
Notifications are painful in themself, so trying to avoid being notified is a smaller motivation ahead of the actual deadline.
Secondly, I try to stagger goal due times - I never want to be in a situation where I can't possibly actually do all my goals. So I have to do A by 3pm, B by 6pm, that sort of thing.
Thirdly, if a goal takes a lot of time (like pomos), I often like to have supporting goals requiring me to do part of it earlier in the day (yeah I need micromanaged pretty bad).
So yeah shoutout to the arbitrary goal deadlines (and weekends off) for making beeminder much less stressful.