Business still goes on. Hundreds of thousands of businesses will start within the next 12 months, recession or not.
But you do have to do your homework, know what you're getting into, of course. Make sure you create a business plan. You need to know your core strategy, and by laying out assumptions into a plan you can figure out what you can reasonably expect to sell, for what level of expenses, and what the starting costs ought to be, and where you'll get the money.
Ultimately, your plan should answer this question for you much better than I have.
Tim Berry is the chairman of Eugene, Ore.-Palo Alto Software, which produces business-planning software. He founded Bplans.com and wrote The Plan-As-You-Go Business Plan, published by Entrepreneur Press. Berry is also a co-founder of HavePresence.com, a leader in a local angel-investment group and a judge of international business-plan competitions.