Many people focus on the 4 percent rule, which essentially says that as long as you withdraw no more than 4 percent from your retirement accounts each year, the money should last you 30 years.
If you're just starting out in the workforce, the very best thing you can do for yourself is to get started in your workplace retirement plan. Contribute enough to grab any matching dollars your employer is offering (a.k.a. the last free money on earth).
These days, checks are direct-deposited, money comes out of a machine in the wall, and we swipe a plastic card to make a purchase. In other words, your kids can grow up thinking money comes in an endless supply if you don't show them otherwise.
Your credit score takes into account years of information in most cases. It's not going to improve in a day. But it may improve more quickly than you think. Generally, the last 24 months carry the most weight, so if you can keep clean for that long, you'll see a boost.