There is a page on Ministry of Foreign Affairs FAQ that answers your questions specifically:


  Question: I will be flying to Europe. I know that our aircraft will land in İstanbul. I am not planning to leave the transit lounge. Do I need to get transit visa? 
  
  Answer: If you will not leave the transit lounge at the airport you are not required to have transit visa. Otherwise, you have to make visa application to the nearest Turkish Representation. Contact information of the said missions can be reached through www.mfa.gov.tr  (Ministry/Turkish Representations). 


Do I need a transit visa for a layover in Turkey?
I finally got my DotA 2 Beta invite. Now to learn the game I read it's a good start to play support heros (like I already loved to do in League of Legends). Even though I'm still pretty new to the game I suspect it's mostly the supports job to buy and set up wards.

I am therefore interested in learning how to ward effectively.


What are good/important spots for wards?
How do I time wards? When should I leave the lane?
And if there there different types of wards like in LoL: when to use which one?

