The document discusses several HubSpot hacks and tips, including: 1) Not letting deal contacts go cold in December 2) Using slider CTAs instead of forms 3) Ways to A/B test nurturing emails, such as by sending different versions to lists 4) Using an announcement bar to display custom messages on a website 5) Triggering workflows after successful product payments 6) Multi-channel remarketing by triggering emails based on ad interactions 7) A blog template with a custom post title field