If you wanna see Prince Islands, Kadıköy center, Moda, Uskudar (Üsküdar) and other historical and well known local districts in Asian side, I will give you some good tips with travel documents such as map and stuff.
No weed. No wild parties. Please ask beforehands if you are planning to invite a friend.
You can buy your own stuff from the market and cook anything you want.
Bathroom and kitchen should be cleaned after being used.
And please use your own bath cleaning products like soap. Its ONLY about being hygienic.