I stopped just two months ago, but knew I was going this time last year. I am easing myself in gently by keeping busy doing the things I want to do , when I want to do them. The sense of freedom is wonderful.
I was actually just going to walk away. Similarly to you, I knew quite a while ago I was 'going'.
About 2.5 years ago, we had many a discussion about me walking entirely. I actually set a target in my diary to count down shifts ( on my original plan, I have about 5 shifts left to do). However, because I work such long hours and so many of them, it was incredibly difficult to actually do any planning. 50% of my days off were spent physically recovering, and on the other 50% I often didn't see my wife as she was at work. Financial planning and what not is therefore difficult - I could go 5 or 6 days and not see her, let alone discuss anything.
Part time for me is a bit of a 'suck it and see' position, but more importantly, when the dust settles it gives me time to actually plan and activate other notions - things which are hard to do when full time in general and on shift work in particular.
I'll shurrup now!
