You'll gwt a load of hatred here for having that much spare.
We save between £1000-1500 a month. This is not all in long term savings. For us it works best to have accessible savings for things like car breakdowns, large bills like car insurance etc. Then we have long term savings in ISA's. We dont touch these generally unless its planned. We also have a savings account for DD.
To consistently save, on payday first thing we do is split money into savings accounts (300/300/300/100). Then we put a set amount in our joint daily expendure account for food etc throughout the month. Remainder is left in the joint main account all the direct debits come out of. We then have a date in the month when all direct debits have come out. We then assess remainder in joint main current account and usually transfer at least another £300 to savings. Sometimes more. We do this as some of the DD payments vary month to month.
Putting a set amount as spending money makes us think twice about just spending willy nilly. So we do probably actually live day to day like lower earners than we are because we don't really allow ourselves to go crazy on spending.
I also have a small savings account i put money i make from secondhand sales in. So if i make a vinted sale or whatever i stick the money in there. I then use that money for birthdays and christmas. It does add up throughout the year and also means i'm not using savings or shocking our current account around birthday and christmas time.
Works for us. May be complicated for others.
We check interest rates on our account regularly and move if needed. We utilise ISA's to get as much tax free as possible. Webalso have roundup on our account so that tops up our savings a little too.
To note, i am aware of how privileged we are to be able to save this amount and that we earn the amount we do. Neither of us are crazy high earners, but our combined income pushes us quite high.