My Mom did the same, even making a list of prized possessions and who would get each one, as well as listing her music, presider, etc for the funeral. The funeral director was in awe - he said he never saw a large family so much in agreement about how everything was handled.

My friend just passed after less than 3 weeks in hospice, but as soon as he made the decision, he and his wife called their kids together and did all the planning the very first weekend. This not only included planning his funeral, but also his final care, at home. He also asked to see his sister, brother-in-law and nieces to say good-bye in person, and a few close friends. Then he went on to address other things he was concerned about - who would get his extensive collection of tools, making sure there was a plan to help his wife continue to spend her winters down South, etc.
These first weeks since his death have been much easier for the family, knowing everything was done "how Dad wants it."

This is a wonderful gift to loved ones.
Sue

I have done my obituary and shown where I keep it hard copy and in Word. Only thing needed is the final date.