Where can you make the biggest savings in your expenditure?

I'm looking at ways to save money within my income and expenditure budget.

There are obvious ways of reducing outgoings for example using price comparison sites for insurances and utility providers.

Does anyone have any ideas or tips to save money on your outgoings?

Review your expenditure items ensuring priority bills are being paid

Recently I have reviewed my bank statement and have cancelled my boiler policy as it was already covered under my buildings and contents cover. This has saved me £12.99 per month that now can be put aside towards a small savings fund.

I am looking to save around £100 a month towards a savings plan so any ideas on how I can reduce my expenditure will be greatly appreciated