When most people think about that question, they usually think about how much money they have in their savings or retirement account. I think it is really hard for people to put money in the bank and leave it alone. It is very hard to "save" for the future that way.
There is a better way to save, which still requires some restraint. Buying a home... and NOT REFINANCING. Once you buy your home, leave it alone... let the equity build. You are going to need it one day, when you are old/older. Is social security going to be there for you? If so, is it enough? Probably not.
My way is a simple and easy way to save - if you keep your hands out of the pot! Another thing people don't think about doing is paying an additional $100 per month towards the principle on their mortgage. Don't put that $100 in the bank... include it with your mortgage payment as principle only and at the end of 10 years you will have brought your loan balance down by $12,000. Wow, that is money in the bank - that you can't touch until you REALLY need it. How many of you can have $12,000 in the bank and not touch it? Be honest... not that many.
Food for thought - money in the bank actually!
If you want to buy a house... give me a call - you will be glad you did.