This week’s rec­om­men­da­tions from our thought lead­ers in retail and travel include arti­cles on lever­ag­ing shop­ping cart aban­don­ment, improv­ing email and pay-per-click cam­paigns, real­iz­ing the poten­tial of social com­merce, and under­stand­ing the impor­tance of get­ting mobile right.