Another recession is inevitable. Here's what this savvy investor learned from the last one

Eric Luehmann was 29 when the Great Recession rolled in like a tidal wave. He can't remember the exact moment in 2008 when he realized that the stock market was crashing, but he recalls watching stock market tickers sliding.

As an accountant who studied financial basics in school, he knew a bear market was inevitable; he just didn't know when it was going to happen.

The financial meltdown, one of the worst crises in American history, scorched everything in its path, from stocks to bonds to the housing market and all sorts of financial instruments most Americans had never heard of.

The unemployment rate peaked at 10 percent. Struggling with job loss and underwater mortgages, millions of homeowners defaulted on their mortgages; 9 million homes went into foreclosure.

Unbounded optimism was replaced by panic. The Consumer Confidence Index plunged to an all-time low of 25 in February 2009. It's estimated that 401(k)s and IRAs lost around $2.4 trillion in the last half of 2008.

Many people panicked and cashed out their investments, hoping to retain whatever they had left.

Almost 10 years later, Luehmann still has a screenshot of his Fidelity account. Taken on Wednesday, Oct. 28, 2008, it shows his personal rate of return from Jan. 1, 2008, to Oct. 28, 2008: -46.6 percent.

But the carnage in Luehmann's account didn't prompt him to pull out of the market.

"I didn't want to do anything from a short-term mind-set that would end up making it worse," Luehmann says. "I'm more of a long-term investor anyways. I just kept hoping that eventually it would get better, and it did."

Today, he's made an 80 percent gain from those dark days — and that's after accounting for his losses during the crash.

It's been a decade of steady recovery, the longest bull market in U.S. history. Many observers believe it can't continue much longer. Bankrate's latest Economic Indicator Survey reports that 52 percent of economists believe economic risks over the next year and a half are tilted toward the downside.

For those who experienced the 2008 recession firsthand, these predictions might leave them uneasy.

Luehmann believes that economic downturn is necessary — and should be embraced.

"Recessions are a natural part of growth, unfortunately. For every five steps forward, you're still going to take a few back," Luehmann said. "If you only look at those few steps backward, of course it's going to get worrisome. You can't do that. You have to keep in mind that you're still looking forward."

Keith Lockyer, investment market manager at PNC Wealth Management, agrees. For those feeling anxious about the next market downturn, Lockyer offers these three tips to help financially prepare:

Have a plan: People who panic usually don't have a long-term investing plan, Lockyer said. Don't wait until a recession hits to figure out what to do with your assets. Make a long-term plan now that will help you weather volatility.

Evaluate your risk: Review your portfolio and decide how much risk you are willing to take while the market is down. Adjusting your mix of stocks, bonds and cash can make your investments more resilient to market fluctuations.

Still not sure about the best way to prep? Consider these additional investment moves:

Go on the defensive: Consider investing in reliable dividend stocks. Dividends are slices of the company's earnings periodically paid to stockholders. Not sure where to start? Companies considered to be "dividend aristocrats" have increased dividends for 25 consecutive years or more, making them viable options to allocate your investments. Many dividend ETFs are available as well if you don't want to pick individual stocks.

Look for companies with strong balance sheets: Consider companies that have plenty of cash and low debt because they are more likely to weather a recession.