If you're interested in visiting I'd suggest doing "must sees". 2 days is not much so start with Auschwitz & Wieliczka 1 Day Tour here's link http://www.yourkrakowtours.com/index2.php?tour=3 (you'll find other popular destinations here) evening spend in one of the restaurants surrounding Main Market Square or go to bohemian Kazimierz for late drink.
Next day you'll spend visiting most popular places in Krakow, I suggest 2h tour of Old Town, Kazimierz and Podgórze with Schindler's factory using electric cart. www.abcitytour.pl
Rests of the time spend visiting Wawel Castle or simply sitting outside the restaurant and enjoying your coffee or wine.
If you need more info just let me know I’ll try to help
Best Regards and have a nice stay in Krakow