In Istanbul, try to opt for an apartment for your stay in order to get a feel of the local life. Beyond Istanbul as well, there are numerous BnB’s that are basically old houses converted into a stay.
Learning some helpful Turkish words and phrases to get by before travelling, as finding fluent English speakers can be quite difficult.
Sample some great Turkish street food to keep you full for longer. This can cost you as little as 1 Lira.
The Lira is not accepted as a legal tender anywhere outside Turkey so make sure you spend it all before leaving.
Read, Read and Read some more on the history of Turkey before you leave for a trip to this wondrous land. It is said that travelling in Turkey without a map is like driving without a GPS.
Haggling at markets is common and very much accepted. However, never disrespect the shopkeepers as the Turks hold manners, above all in high regard.