What are some good things to keep in mind during a job interview?

Be Yourself

and consider they need you, but you have many options

first: whom will become my direct manager 

second: whom the group will work with them

third: work atmosphere

then focus for salary and medical insurance

this very important things

1) Always Be Active

2) Be Confident

3) Only Speak on that, on which  you can argue.

4) Speak Wrong but Speak Confidentely

5) best of Luck :)