This (american) article from msn.com is interesting. (I think we can safely ignore no7!)
- Spending without a budget.
- Carrying a balance on credit cards.
- Ignoring interest rates.
- Not investigating disability insurance.
- Failing to see how little purchases add up.
- Not matching employer's contribution to retirement.
- Waiting until the last minute to fund IRA.
- Paying everyone else, saving "what's left."
- Not managing your investments.
- Getting emotional about your investments.