From Bankrate.com: http://www.bankrate.com/finance/p...days-1.asp
"Giving up restaurants and fast food could save an extra car payment. The average consumer spends about $272 over 40 days on eating out, according to the U.S. Department of Labor's 2010 Consumer Expenditures survey."
I would not give up restaurant visits, but can get quality enjoyment at reasonable pricing.
40-days is a symbol of test and trial according to the Bible; but consistency and healthy-habit building is the key for this shape-up.