When creating a new reminder, it would be very handy if you could make it trigger when you are about to create a new ticket/invoice to that specific customer.

Example: I want to be reminded that next time I make a ticket to a customer that the technician takes certain service parts with him to the customer or something like that which I would most definetly forget to do...

In the reminder creation windows you could just tick a box and choose will it be triggered by date and time like now or by other event like ticket creation.