Relevant to another discussion (Our unexpected winners of 2023), but perhaps moreso here, I have to say that my “unexpected winner” of 2023 are the plugins increasingly being created and shared on Omni-Automation. When you start integrating the plugins into your workflow it really adds another level to the possibilities of OmniFocus. Templates, as @timstringer describes, is the one I really embraced this year, but I’ve also started to really take advantage of another plugin created by @Kaitlin: the Move to Action Group plugin.
For those not familiar, action groups can loosely be described as ‘sub projects’ in OmniFocus. They are very useful at providing some hierarchy and order to projects with many tasks. I didn’t use them so much previously as adding items directly to the appropriate action group was slightly cumbersome, but the plugin makes this really easy.