For this week's print edition Focus section on Banking & Finance, I talked with a number of local business people about their advice to companies on things not to invest in. Here's the takeaway from thos conversations: Dennis Nolte Title: Senior vice president, Capital Guardian LLC Commercial real estate, except for the building you and your employees are housed in. Companies like Walgreens, CVS and Office Depot are selling off their commercial properties and triple-net leasing them back as a…