A small regular overpayment can substantially reduce your mortgage term and total interest. On a £100,000 repayment mortgage, increasing your monthly payments by just £100 a month would bring a 15 year term down to 12 years and 8 months. If you feel your mortgage is a big factor in deciding when you can retire, you should seriously consider this.
Review your debt situation and set yourself a real budget for each month. Get rid of any credit cards that you may have a tendency to over-use. Move credit card debt to a lower unsecured rate, or get advice on consolidating with your mortgage. In order to make the most out of raising the funds from your mortgage, you should not reduce your monthly payment, just redirect it towards the mortgage so that you are paying off the same debt but quicker. Most mortgage providers now allow overpayments of 10% per year so use this to clear down a good amount of debt in a year. Work out the monthly payments with interest and set yourself the challenge of clearing what was the credit card balance in one year.