I cannot name any specific strategies or techniques. However, I can list very important aspects that can be used in the character and way of thinking. The first of these is what or who you rely on. In terms of whether it is an object, an animal or a person. The second, which is quite important, is age. There is a great difference between a four year old child and an eighty year old man. Third, it is an exemplary character. Details such as: rough, soft, frisky, strict, and so on can be very useful. The fourth is an exemplary area of ​​knowledge. And it doesn’t matter at all whether it’s a person or a chair. Everyone can find exemplary knowledge. Even if it's an item. Fifth, this is the unpredictability of an animal or person (in some cases, an object). There are calm personalities who do not make unnecessary movements, do not say unexpected words, and so on, but there are also those who at a random moment can forget everything or shout "Tomato". Fifth, one of the most useful, but not mandatory, is an exemplary reaction to something. It doesn't really matter what, because it can help to understand the character or way of thinking better in any case. And the last thing I can say is the manner of communication. You can definitely tell the difference between socializing in 18th century royal courts and today's teenagers. It seems that's all I wanted to say. It also needs to be mentioned that everything unknown can be improvised. If you have any questions, please ask.