Lots of things I wouldn't be without in the kitchen - I too remember the days of a twin tub (and before that the launderette!) which I inherited from my great aunt, along with her fridge, when she went into a care home. I was just setting up in my first unfurnished place so was very grateful, but even more grateful when my mum bought me an automatic washing machine a couple of years later.
Outside the kitchen the thing that has revolutionised my life the most is my Fitbit. I asked for one from my kids for Christmas a few years ago as I knew I needed to get more exercise. Last year they bought me a newer one as the original was becoming unreliable and the new one has more features. Since having one I have not only got fitter but have lost a considerable amount of weight - over 4 stones! Not all due to walking, as a change in my medication contributed, but as I began to lose weight, walking more became easier and using the Fitbit motivates me to do little extra bits of walking such as parking a bit further away from where I'm going to get the extra steps, and realising now that there are places I can walk to where I used to drive. I now regularly join a group for a weekly health walk which I'm sure I wouldn't have even considered a few years ago. It's great since retiring last year realising that I feel younger and fitter than ever despite being older. It helps too if you are competitive as you can link it with friends who have one and compare their step counts over a workweek or a weekend. Sometimes I go out for an extra walk just to beat a friend's step count as the competition period nears its close!