While shopping is a task I know but you need to be careful and budget these days, Step 1 is to keep ALL receipts for everything you buy.
You can use these receipts to track everything in you’re ledger this way you will be able to see what you are spending and where. This is important so that if you are trying to cut back on spending you can see what things you have bought that you didn’t need.
Now that you have done this you will need to organize you’re receipt into envelopes 1 for each month for each different thing such as Bills in one and frivolous in another or credit in one and home expenses in one. It’s up to you what ever method is easier for you to keep track of everything..