In order to help you type people quickly here's some signs to look for. They are shown as a positive correlation; the opposite is a tendency to the other mode.

Thinkers prefer to deal with impersonal processes.
Feelers prefer to deal with people processes.

Both Thinkers and Feelers are equally capable of change/improvement, its just the focus of their efforts.

Thinking tendencies

You don't get involved with TV soaps.
You don't get easily excited
You trust reason rather than feelings
You actions are not affected by emotions
You don't really help anyone without any "recompense"
You don't like to/or find it difficult to express your emotions
You don't tend to sympathize with people.
You value Justice above Mercy.
You don't easily empathize with the concerns of other people.
You don't care to much for other peoples troubles.
You think almost everything can be analyzed
You try to stand firmly behind your principles
The Scientific approach is best.

Feeling tendencies

Tendencies towards the opposite of Thinking.