The Art of Dying Well, a digital initiative, is supporting the Co-op's campaign to get people talking about death and says the responsibility should not fall on relatives.
The organisation's Margaret Doherty told Premier: "We believe that we're on a journey towards eternity and an eternity with God, so that's something to look forward to - but we must live our lives now in the preparation for what's to come.
"It's a good idea to start thinking about making a will because putting your affairs into practical order helps those who are left behind."
The Co-op say greater openness towards discussing mortality could also help people come to terms with bereavement sooner.
A joint campaign will see at least 20,000 people asked in the coming weeks to complete a survey about death and planning for end of life.
Margaret Doherty continued: "It's a good idea to start thinking about ones' funeral; what hymns you'd like, whether you'd like a burial or cremation, which minister... that you would like to officiate over the service.
"It just makes life easier for those that you love, that they know this is what you would like and this is how you would like it."
Robert MacLachlan, managing director of Co-op Funeralcare, said: "We know that talking about death is one of the hardest conversations people have to have.
"It's a huge national issue and that's why we're encouraging the nation to get talking about this important subject, as a huge number of us believe the way we approach it needs to change.
"If we had more open conversations about this topic, just think of the positive outcomes that could be achieved.
"Making arrangements for a loved one's funeral is a huge responsibility, with everyone having their own personal wishes.
"No-one likes to think about their own mortality, but having a discussion and planning ahead can have huge benefits in terms of being able to do the right thing for loved ones when the time comes."
Click here to listen to Premier's Cara Bentley speaking with Margaret Doherty at The Art of Dying Well:
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