I mean, there are certain usage statistics that are relatively even across every part of the earth with similar climate conditions.
You need to know what uses how much and then work through the high usage items step by step.
Heating is usually the biggest energy usage.
I live on a tiny 322sqft and still use about 1000kWh a year for heating even though target temp this winter was 16C/61F only raising the bathroom to 21,5C/71F for showering every second day.
Then the question is what you heat with. If you are already heating with gas - like this apartment complex is - you can't really go cheaper.
If you are heating with resistive heat and have central air like common in the US, going for a heatpump next time around just makes sense. Dosen't need to fully replace you current heat source - the same size as your current air conditioner will usually work perfectly fine 80-95% of your heating season.
But biggest saving is just mediating temps and having good heat control with good programming - keeping your house at 70F the entire day if you're gone for 8h and sleeping for 8h is pretty useless.
There are edge cases of course. My mum has under floor hydronic heating, so switching temps during the day does very little.
The same goes with hot water.
If you are going with gas hot water, very little saving potential.
If you have electric, heat pump next time around etc.
Same with temp holding. Because my mum lived alone for some time now in the house we shared as 7 a decade ago, our hot water storage was way oversized. Solution? It only heated for an hour a day in the early morning. Because it was very well insulated it only dropped like 20F max in 24h and she barely used a tenth of it on a weekday.
I use a maximum of like 50kWh of warm water a month with an average around 30kWh, so even if I cut that in half, that's not even a day's worth of winter heating.
Next is refrigeration.
It's usually quite a huge, but forgotten load.
Switching from a fridge that uses 2kWh a day (which isn't unbelievable with US fridges) to something that uses half (1kWh a day) saves the equivalent of some 50 full loads in a US vented dryer.
Washing can be a huge difference aswell.
When a TL uses 20gal of hot water, where a FL uses only half that in total, you can cut your hot water usage in 1/4th there as well.
Scale that by the number of loads you do.
My machine uses 1 to 1.2kWh in energy for a full load on "hot" (140F) all included and only about 0.5-0.6kWh on "warm" (104F).
Drying of course is the whole heat pump thing. The new LG full size heat pump dryer has a rated connected load of below 900W. A full size dryer is like 5kW.
Sure it doesn't heat non stop - but just keep in mind you can run the LG 4-5 times as long as the vented dryer with the same energy usage and you see why even doubling dry time still saves 50% or more.
Cooking is actually a matter aswell, but not quite as much as one thinks.
Our ovens use about 1kWh for 1h of baking. Running a microwave for an hour is like a max of 1.5kWh. Pan cooking isn't that much of a usage as it's usually quite a short time and not a full power for long.
Dishwashing then is another matter.
I pay about 0,5 cents per liter of cold water.
My DW uses 1kWh running of of cold and 0.5kWh on hot. Water usage is about 1/3 of the energy usage of that cycle.
In comparison, even on the highest water usage cycles, my washing machine uses about the same in water as in energy.
It's really about looking where you actually use a lot of energy and where you can save it.
That also means where you are willing to sacrifice something to save.
And if you aren't willing to sacrifice in any way, well, that's that.
well you know. 
