Good "Sleep Hygiene" is a combination of things like getting into a routine where you gradually wind down and relax as you get to bedtime. It helps to limit the amount of alcohol and caffeine in the evening, and reduce screen time. It might not get you to sleep, but there aren't many side effects from good sleep hygiene.
I was going to contribute to this yesterday, but it was getting too near to bedtime! I'm pleased to see that someone has been talking about sleep hygiene while I was asleep.
Generally...if I've not got to worry about getting up the next day or a particular event....I'm fine.
I'm writing this on the interpretation that you are not talking about working shifts. If you are working shifts, then what I'm about to say is much more difficult to apply.
I have experienced anxiety and stress to varying degrees ever since I first went to senior school, but I have never suffered from insomnia, or used medication or therapy.
Good sleep hygiene has always been critical for that. When I was a teenager I delivered morning newspapers and trained myself then to be awake at 0630 to start delivering at 0700. At University, I was the one who attended 0900 lectures so that lots of other people could copy my notes. I then commuted for 30 years needing to be up in time to get trains for work. I have been retired for more than a decade now but it is still rare for me to be still in bed much after 0700. And I have never done "festering in the pit" at weekends.
I only used to get bad sleep through anxiety if I had to be up ridiculously early to get trains or planes.
Sleep hygiene is what has enabled me to do that. I nearly always go to bed a few minutes either side of 2300. I don't take caffeine after about 1700. Another important factor is time of evening meal: at least 2 hours between eating and bedtime is essential, and 4 hours is preferable. If you can, make sure that the bedroom is only for sleeping, don't do "daytime" activities there, especially anything that involves using a smartphone (I deliberately don't have one of those).
In my younger days physical exercise was an important part of sleep hygiene, it is easier to sleep if the body is physically tired.
Routine in the lead up to bedtime is important: do the same things in the same order. And this needs to happen in the morning too. When I commuted there was no "recovery time" between the alarm going off and the train leaving the station. Again, everything was done in the same order, and distractions were not permitted.
In those days alarm clocks were mechanical and did not have a snooze option. I turned the alarm off and got out of bed immediately, though I'm not sure that was good for my health. Looking back 5-10 minutes of snooze, built into the morning timetable, would have been preferable. I know some people who positioned the alarm out of reach of the bed so they had to get out to switch it off.
As it happens, now is a very good time to start taking sleep hygiene seriously. We are approaching the short days of winter, and the clocks go back 1 hour next weekend. The most important thing I would recommend is that, all through the coming winter, get up at sunrise, whatever your plans for the day. And don't "burn the midnight oil", though a small number of exceptions for Christmas/New Year are permitted! The human body has evolved to be awake in daylight hours, use that to your advantage.
My advice would be to spend this week thinking about what good sleep hygiene should be like for you, so you can start doing those things when GMT starts next week.