As I also used to spend a very high amount of money( which caused me to get into troubles) I would be happy to help you with saving money as I am experienced in that.
First of all, at the start of a new month, start making a list, everything that you spends your money on, it can be water bills, and it can be drinking with friends, write the activity and the amount you spent.
After you have a full list of the whole stuffs you spent your money at, you should be taking few hours and consider every single payment you made.
Try to think how you can prevent this payment from being done at the next week, or how you can lower it.