You've probably seen Martin Lewis on TV talking about money savings, well he has dedicated a section of his website to money saving tips for the Over 50's. From the site:
"If you're over 50, or about to get there, your money world goes through some big changes. So sort your finances now - the older you get, the more your cash needs to look after you.
Your income may fall, but it'll be easier to get freebies. Whether you'll work, retire, or travel the world on a unicycle, this is a treasure trove of 50 crucial tips for MoneySaving in your 50s and beyond."