Now that you look the part, you have to have the right mind set to be a Tsundere.
This world isn't really a nice one. Sometimes you don't want to socialize with this world, why bother right?
If someone talks to you (that you don't know) Be polite, but don't show much interest in them. Tsunderes don't trust very easily. Don't call someone a baka for them saying hello or wanting to be your friend. Just try to make the conversation as short as possible.
As you get closer to them you begin to show your Tsundere side. (Try to show it as soon as possible in the friendship so they know what they're getting into XD) At this point, don't start conversations with them. Make them start conversations with you. Once they do, try to carry on the conversation for a bit.
Once you and your friend becomes really close then you begin Plan: Completely Tsundere. At this point you just go all out Tsundere XD
But remember, you just have to have the mind set of a Tsundere. That's a pretty important part.
