Opportunities abound, even during a down market.
Back in 2000 I was working at a web start-up when the market gave us a huge gift...the dot-com crash. Thanks to that crash, we recognized that web advertising CPMs were quickly descending from outrageous highs and it was now affordable to acquire customers with web advertising. With fingers crossed we poured everything we had into new customer acquisition campaigns, and after 12 months we had acquired enough new customers to become profitable. That couldn't have happened so quickly without the dot-com crash and resulting lower ad rates.
Here is a beautiful presentation from The Economist about the opportunity recession gives you to increase market share by investing more in marketing now instead of cutting it. Sure, some of it is self-serving since they obviously want to keep selling ad space, but they present many insightful points and it's worth your time if you're a marketer.