Recomended places to visit in Taksim > The house cafe - Simit Saray- Turkish Natural Soap shop and the owner isan American old lady ( if you want to visit her shop ) you need to take the Tunel to take you to the end of Istklal street. Then take left and walk down in the street and you will find a tiny little shop that sells soaps and bath accesories.
one more thing > you need to try the chestnuts from Taksim Square( Haji Ismaeel) always greets me whenever i pass by him and i only ate once from his Chestnuts :P and in Istklal street you need to try their grilled potato