Start thinking about your retirement before your boss does, marry someone who makes you laugh and only pack what you can carry yourself.
These are among the top 50 'pearls of wisdom' handed down to offspring by wise retirees.
Don't go into business with family, avoid lending money you're likely to need back and never let the sun set on an argument with friends are also among the best advice.
The survey of 1,000 retirees by the Skipton Building Society sparked many financial tips, like 'pay off debts rather than spending money on luxury items' and 'try to settle your mortgage as early as possible'.
Stacey Stothard, from Skipton Building Society, said: "The pearls of wisdom which feature in this list show just how wise and wonderful our older generations are.
"By retirement age, people generally have a solid understanding about what's important and what matters most - who better to advise younger people than those who have already experienced so much?
"The over-65s can look back on mistakes they have made and opportunities they've missed during the first two thirds of their life, and try to encourage their children and grandchildren to follow a different path.
"Equally in sharing their experience of what's worked well - and prioritising for the longer term - not just the here and now - is priceless advice coming from many retirees."
When it comes to finances, retirees are brimming with useful tips for youngsters - such as plan for retirement rather than burying your head in the sand.
'Spend some, save some' is also advice commonly passed down by people over the age of 65 - with many feeling you should holiday as much as you can, while you can.
Retirees are quick to suggest people should start saving at a young age, and recommend people don't lend money they may need back.
In relationships, retirees reckon you should marry someone who makes you laugh, and stick by old pals even when making new friends.
Stacey Stothard added: "At Skipton, we've been helping people to lift their heads up and plan for their life ahead for 163 years, so we've got lots of our own pearls of wisdom to share."
TOP 50 WORDS OF WISDOM
1. Pay your bills and stay out of debt
2. Pay off debts rather than spending money on luxury items
3. Pay off your mortgage as early as you can
4. Plan for retirement rather than burying your head in the sand
5. Teach your own children how to budget from an early age
6. Be kind
7. Spend some, save some
8. Teach your children the value of money
9. Pursue hobbies and interests outside of work
10. It's OK to need help
11. Don't make decisions when you're angry
12. Treat yourself once in a while
13. Spend more time with the children before they leave home
14. Don't complain about getting older: not everybody gets the privilege
15. Start saving at a young age
16. Manners maketh man
17. Do something every day that makes you happy
18. Try to not worry about what other think
19. Travel / go on more holidays while you can afford it
20. The most important person in your life is the person who agreed to share their life with you - treat them as such
21. Neither a borrower nor a lender be
22. Never lend money that you need back
23. Make new friends but stick by the old ones
24. Always trust your gut feeling
25. Marry someone who makes you laugh
26. Always lose gracefully
27. Take criticism constructively
28. Spend quality time with your grandparents as they won't be there forever
29. Don't be in too much of a hurry to grow up
30. Make sure you get a job doing what you love
31. Always sleep on a big decision
32. Get to know your neighbours
33. To thine own self be true
34. Never let the sun set on an argument with friends
35. Start thinking about your retirement before your boss does
36. Never go into business with family or friends
37. Happy wife = happy life
38. Don't work long hours, save it for when the children have left home
39. Nothing worth doing comes easy
40. Only pack what you can carry yourself
41. Be persistent
42. Do what you can to live close to your grandchildren
43. Floss regularly, dental problems are awful
44. Always avoid inconveniencing others
45. Never give up what you want most for something you want now
46. Don't rely on one or two close friends, create a network of many
47. Never give relationship advice - you'll always be wrong
48. Continue date nights with your partner after having children
49. Never make someone a priority who only makes you an option
50. Clean less