To pray for a good death is never to wish for death. Life is a gift, and it is right to want to live as long as you can. The prayer is about losing the fear of death, so that you live more fully now.
A good death is not measured by how the body goes. It is measured by how awake the one inside is when it happens. A slow, gentle passing can still be full of fear. A sudden one can be met completely awake.
Many people fear a sudden death most: no warning and no time to prepare. The answer is on the page before. Sudden is only sudden to someone who has never been there. You have passed through that door every night of your life. What has been crossed many times, awake, cannot take you by surprise. In that moment there will be no time to think. You will do what you have practiced.
The tradition teaches that as the body dies, its elements dissolve, each into the next. The prayer below names them. Let each one go as you say it.
The prayer is not a bargain with God. It is an act of trust: you place the most important moment of your life in hands wiser than your own plans.