We have a local organic grocery store called Real Foods 4 blocks away.  Also 3 blocks away there is also a corner store with many essentials open very late and there is a Walgreen's right across the street from this store.  Just walk down Willard Street to Parnassus, turn right and walk to the corner of Stanyan.  There is also a Trader Joe's grocery store on Masonic near Geary, there is a Whole Foods at California at Gough and there will be a Whole Foods coming to Stanyan at Haight in 2010.