As an IT guy, I query the "SSD pull less power" assertion. This is often not true at all, you may want to check the devices you're using. SSDs are better in terms of ruggedness but they don't always pull less power (and in fact can pull more because they're running at faster bus speeds!).
Generally, however, I don't change the energy I pull very much. I pull power because I need to use it. This is often overlooked by all the green-policy writers. I don't have things pulling electricity for the fun of it, I have them because I need them. I have things in standby because I need or want them in standby, and so on.
However, there are some obvious changes. I bought an all-electric house last year and I'm slowly putting in some small solar setup into it, building on it each month. It's an amateur setup, but it grows all the time and is at the point where it is saving me money already.
- Before I even started, I noticed a lot that I changed on day one. The previous guy had halogens and incandescent lights everywhere. I removed over 1KW of lighting and replaced it with LED bulbs that don't even pull 60W collectively in normal usage. There were literal scorch-marks on the ceiling from the light fittings (which all had multiple lamps!) previously because of the heat he was throwing away.
- I turned off the immersion heater. It was on an "Economy 7" timer that basically means it only turned on overnight to try to save money, and then cooled throughout the day. Those things were built in an era of housewives, and as someone who lives alone and work during the day, it was just a waste - by the time I get home, most of the savings have cooled away. I turn it on when I need it now, and am looking at an instant hot-water heater and a power shower instead. Higher pull, sure, but far less power overall.
- Similarly, I turned off all the storage heating. Same problem. I'd wake up baking hot in the morning and by the time I got home the house was lukewarm, and I'd be pulling so much power to do it that it was wasteful.
- Better insulation, sealing lots of holes (e.g. an old tumble-dryer vent), keeping doors closed, and point-of-use heaters and water-heating. Higher peak load, sure, but far lower overall usage. I even use a Tassimo rather than a kettle so it only heats what I'm going to drink, and only to a temperature that I'm going to drink it at straight away (I hate having to wait for my tea to "cool" first!). The house maintains 20C (in the UK) for 90% of the year and I only need to put the heating on for maybe a month at most.
- A robot vacuum rather than a large Dyson. He runs around while I'm at work, and I can charge him very cheaply or even for free if I have solar battery power still. Far better than a 2KW monstrosity.
- I got a set of Worx tools that all use the same batteries, and I put the charger on the solar. So my "jobs around the house" don't use any power. Even cutting the lawn uses nothing but solar.
- Smart plugs. Technically I'm pulling power to run them, but they let me turn on/off the solar remotely and monitor my energy usage. It's also helpful for inaccessible things - I can turn on my external garden power socket from an app, I can turn on some gadgets that are high-up on the ceiling without having to get up, etc. Tiny power usage overall (<1W each in standby) but savings because I can just turn things off when I remember. I put the dishwasher and the washer-dryer on a plug but I have a control button that I twist to turn one or the other on. Not only does this stop me blowing a fuse, but it also means that I separate their usage and can turn them off remotely when their program is finished (and they are connected to a water leak sensor so they get turned off if they drip water anywhere).
- I have a second small freezer that's only needed for half the month. So when there is space, I empty it into my main freezer and then turn it off with a smart plug. Also lets me know if the power has gone out and how long ago, if I need to do something about my frozen food!
- I use a slow-cooker - I often prep meals on a weekend, leave them in the slow cooker, and then power it up remotely from work. By the time I get home, the food is piping hot and ready to eat immediately. I do this throughout winter, and tend to start with veggies and add meat later in the week (so the meat doesn't get re-heated too many times). I also bought a pair of silicone inserts for it so I can keep two different meals going and just eat / rinse one out. The slow-cooker is on a smart switch that monitors energy usage and it costs less than other methods of cooking and has much lower overall peak draw.
- I didn't make a "change" as such but I use a laptop rather than a PC, and all my "always-on" servers are using the solar. I use Raspberry Pi's and a NAS box for things like entertainment (my own personal Netflix/Spotify) and watching TV, tracking aircraft, monitoring the solar, etc. etc. All my CCTV cameras are PoE run from the same setup, which has its own UPS. The whole shebang uses less than 80W at the wall. I also don't have a physical TV, I use my laptop, so I don't have a huge TV running for 8 hours a day like some people I know.
- Each month, I spend more on more batteries, a better controller, more panels, etc. and slowly move more to the solar and lower my grid bill. I have such lower usage than the previous guy, in fact, that even at the start the electricity company kept estimating I would use nearly TRIPLE the energy that I did. Presumably because of the previous owner's wasteful usage. Each time they would take a huge payment from me, but my bill would be tiny, and I'd demand a refund - and then spend the difference on more solar or batteries!
There's plenty you can do, but do remember - you're pulling power for a reason. For me, that reason is most often "luxury/convenience" (e.g. running a washer-dryer), and it's a conscious choice (because I work hard to earn money which I then use so I don't have to work so hard!). I don't mind adapting a little, but I'm never going to be one of those people who monitors every watt and cuts out all appliances. What I will be, though, is someone who has planned - by retirement - to generate all the electricity I do use. Including, potentially, an electric vehicle.