You can almost hear the collective slaps to the head.

This recession has brought to light dumb money management practices, forcing just about all of us to confront our financial foibles.

Maybe, for instance, you're one of the ones who panicked and sold during the market bottom. Or, you believed housing prices were guaranteed to rise.

The federal government is tapping behavioral economists -- experts on why we humans make the money judgments we do -- to help devise regulations so that people don't take on unaffordable mortgages and to help them understand their actual credit card fees.

But these efforts just scratch the surface. Here are four common mistakes that surfaced during this economic turmoil, and fixes that we can put in place to prevent ourselves from making the same costly error again:

Regret 1: I didn't have emergency reserves.

Outsmart yourself: When we're confident about our security, stashing cash can seem like a waste. We'd prefer to put the dollars into a "better" use, whether it be sprucing up our home or going on vacation.

Last year, when the unemployment rate started soaring, so did the savings rate of suddenly scared Americans.

If you were one of those scrambling to build emergency reserves, you may abandon the practice once

Warren Buffett tells CNBC that while the economy "hasn't gotten worse" but also hasn't "gotten much better" over the past three months, he doesn't expect a 'double-dip' recession and sees significant improvement in residential real estate.

In a taped interview with Becky Quick airing this morning on Squawk Box, Buffett says he looks at a number of indicators, including data from Berkshire Hathaway companies, and "we have not bounced -- but we've quit going down."

Unless there's some "horrible event," Buffett thinks the odds are "very much against" another significant downturn for the overall economy in the near future.

He also sees "important" signs of life for housing: "I think we're certainly-we're through the worst of it in residential real estate in all probability. And-- and-- and the reason is we're building a lot fewer houses and we're-- and we're forming households, so that solves itself over time. Doesn't do it in a day or a