What's Your Biggest Financial Regret?

What is the number one financial regret of Americans?  According to personal finance website Nerd Wallet, it turns out that roughly 71% of Americans express regret about their ability to manage their money.  First on the list was not planning early enough (48%), followed by too much spending on non-essentials (39%), credit-card debt (33%), and not having a budget (32%).  While baby boomers led in the way in the "not planning early enough" category, Generation X and millennials were tied in regretting spending on non-essentials.