"The wine section at your local grocery is a minefield"  That's a quote from Epicurious and yes, the wall of wine is tricky territory. The typical large grocery store carries between 500-700 different selections. A few Portland-area supermarket consistently stock over 1000 different wines. Recent industry surveys say the markup on grocery wine currently hovers around 50%. Given that, it's unlikely the wine section is going to get any smaller or easier to negotiate.  Minefield?  Maybe. Overwhelming?  Absolutely.     "Two-thirds of what we buy in the supermarket, we had no intention of buying."   That claim comes from Paco Underhill,  author of "Why We Buy", "Call of the Mall" and a recognized expert on...