As mentioned get your will in order, a good tip for everyone, it saves worrying.
Buy a funeral plan, at least it is in place for when you need it and the cost can be spread over 1 or 2 years, depending on how long you think you’ve got (smile) or paid for upfront of course.
Get all your paperwork in order, I thought I was good at this but still had things to do. I created a file that contained all insurance, pension, will and mortgage details, etc. When you go into it you realise all that you have to do to cover a death. It takes some confronting but the peace of mind when done is worth it. I created another file with personal messages, wishes and desires, for my family and friends, so in the event of me going this was there for them, all the things I wanted to say to each person, how they touched my life, my hopes for their future. This was tough as I really had to think about my going and what I wanted to say. Again though, once done, I achieved peace in this area. I had done what I could to help them and let them know what they meant to me.
After these files were done I looked around and thought of the jobs that needed doing and what I could do now. I did not have much energy but facing an uncertain future helps and I completed so many little jobs that I had put off 'for another day'. It was one day at a time, and what could I do today, some days were good and some were very bad, but you keep doing what you can.