Time-Dependent Workflow – Considerations in Salesforce?

When defining time dependent workflows in salesforce we have to use standard and custom date and date/time fields defined for the object.

We have to specify time using days and hours.
Also add actions to existing time triggers.

Following are Time-Dependent Workflow – Considerations -

1. Maximum of 10-time triggers per rule
2. Maximum of 40 actions (10 x 4 types) per time trigger, and 80 actions per workflow rule
3. Workflow default user must be set up before creating time-based rules
4. Precision limited to hours or days
5. Cannot convert leads with time-dependent actions in the Workflow Queue
6. Time triggers cannot be added to or removed from activated workflow rules
7. Not possible to create a time-dependent action associated to a rule with a trigger type of Every time the record is created or updated

Thanks.