It really does change your life OP. I've changed my financial habits drastically and it is the one thing that has had the biggest impact on my mental health.
You really do get a buzz from being in control of it.
My biggest mistake used to be spending with gay abandon as soon as I got paid then scratting around towards the end of the month "managing" until the next pay day.
Such a vicious cycle. Come next pay day, you get access to all that money again and what do you do? Spend it all again of course!
The secret for me has been completely turning that way of thinking on it's head.
As soon as I get paid, I put every single penny into savings accounts. Then each day I transfer exactly the amount I will need for that day. So If I am doing a food shop, I guess roughly how much I will need.
If I am then out and tempted by something and (this is important) AFTER asking myself "do I want this or do I need it?" (massive difference) I still can't buy it because I don't have the money to hand to spend anyway.
Then when I get back home, every single penny that is left over from that day's "guesstimate" is transferred straight back into the savings, even if it is only 50p and the whole process starts again the day after.
It sounds like a pain in the arse but it honestly does work and really makes you focus on what you are frittering your money on.
Also for me, I find it more encouraging if there is a large amount in the savings to start off with rather than say £10. You do tend to think "oh well it's only a tenner, it will take me forever to save anything so are less likely to be as committed.
It hurts a hell of a lot more to look at say £300 and consider taking anything out for non essentials.
I never thought I could change but if I can do it anyone can, honestly.
Good luck!