Do you ever send something to someone else to action and want to tick it off your list but not forget that you need a response?
I use Obsidian for task management and I’ve started using a simple workflow to help with this. I make a note of what I did, followed by the hashtag ‘#waiting’.
Sent updated tax information to accountant #waiting
Although I don’t track tasks in Obsidian, I use that general approach all the time! I use Reminders for this. I either send the related email to Reminders or create a task if an email is not involved and then add the #Waiting tag to the tasks. Works great and I can set an alert to pop up when it is due from the person to whom I’ve delegated the task.
When OmniFocus had contexts (v2) I started using @name to indicate the person or persons (multiple contexts) related to the task. I’ve continued this in v3 where tags replaced contexts, and continue using @name in tags. These person-tags lend themselves to useful OF perspectives, reviews, etc.
I do something similar to quorm. I used to do child tags of Waiting (e.g. Waiting : Tom) but I wasn’t really seeing a benefit over just using @Tom for both waiting and non-waiting items. Maybe I just don’t know people that far behind on their work.
Plus in OF 3 I can just add @waiting after @Tom to put it on hold.
I have a list on my Trello board called “Frozen” that stores these tasks. Makes it easy to glance over and check what I’m waiting on, and even lower friction than tags.
OT, but while on the topic of special tags, I also use “%” in tags to indicate supersets of projects. For example %Phase III is not a project but indicates all the projects comprising Phase III of a deployment program. So, a task “Meet with PMO managers” could be tagged with @Johan @Sivi %Phase III
I use Reminders for this. I either send the related email to Reminders or create a task if an email is not involved and then add the 
