I've managed my Slack notifications to cut through the noise by configuring settings based on each workspace, selectively installing workspaces on my phone, opting for email digests instead of instant notifications, muting certain channels and disabling actual Slack noises, pausing notifications to protect focus, and following keywords and critical channels. I customize my notifications per workspace to strike a balance between getting useful information and being overwhelmed, and use tools like Zapier to further tailor my notification experience.