What are recommended practices for creating queues?

Assuming Omnichannel is enabled, here's some recommendations when creating queues.

1. If your queues don't have assigned agents, they must be marked manual (this applies to the default queue too).
2. Agents added to queues must sign in to the Fusion application and set themselves as available for the kind of work that will appear in their queues.
3. If agents in a queue can't keep up with the workload, more agents must be added to prevent accumulation of work in queues.
4. Each agent must be assigned to just one queue, a best practice. If an agent is in multiple queues, there's no order guarantee between queues. A lower priority item from one queue might get assigned before higher priority items from another queue.
5. Kept the total number of automatic queues low.
6. If the queue has only one or two agents, it's generally better to make the queue manual.
7. The number of Assignment Rule Sets must be kept to 500 or fewer.
8. The number of assignment rules must be kept low for performance and also for debugging purposes.