"Stand-by" modes are parasitic loads or "electric vampires", which consume quite a lot of energy. 1W is approximately € 1 per year. You can use a power strip or timed socket to avoid unwanted consumption.
Circular DIY and Habits
Change your energy supplier to one only using renewable energy, if you have not already done so. if all the energy you consume comes from renewable sources, you should also try to be as efficient as possible, because all energy production needs natural resources and endangers the environment.
Try to minimize the time on the daily shower. Every single minute is vital in water saving. And if you would like to go a step further, just consider starting to have the shower using slightly cooler water.
A good way to start improving your recycling habits is to sort the different types of waste that you mostly produce, for example, organic waste and paper/cardboard, and then you can gradually do it with rest of waste.
Homes also have their own maintenance manual. If your house has not one, you can search for generic manuals on the internet, according to the type of building you are living in.
It is recommended to learn about how your house and all the systems devices in it work! Follow the instructions for use and maintenance and use them according to instructions. By knowing how to better use systems and devices, you will prevent from breaking or damaging, you will extend their life span, and will save money and resources.