Common Money Mistakes by Age Group

Create a comprehensive article about common money mistakes organized by age group. Cover: 1) 20s mistakes (lifestyle inflation, not investing early, credit card debt). 2) 30s mistakes (buying too much house, neglecting retirement, no life insurance). 3) 40s mistakes (raiding retirement accounts, co-signing loans, mid-life crisis spending). 4) 50s mistakes (too conservative investing, helping adult children too much, ignoring healthcare costs). 5) 60s+ mistakes (claiming Social Security too early, not planning for longevity). For each mistake, explain why it happens, the real cost, and how to avoid or fix it.