Social Calendar Notes - A simple one with big impact
This is something I really loved in previous social scheduling tools and was surprised not to see in Hubspot, the ability to drop quick notes on dates without having to draft a post, or schedule something.
Simply leave a note on a date in the calendar, it helps to map out post ideas, holidays, blocks for future content, etc. If you want to go crazy, colour-coded notes would also be a nice addition.