I suspect like a lot of the UK population you have made some New Year resolutions about getting fit and losing a few pounds. These resolutions normally do not last past the beginning of February, so try something different; gain a few pounds, (in the purse or wallet), and ignore the diet!
Everyone needs some savings; borrowing money to meet emergencies is expensive, hard work and precarious.
Think of saving as four pots; emergency, holiday, next car and pension.
As a golden rule, do not spend all your income, set some aside for later and spread it across your savings pots.