Consider meeting regularly with TAs teaching parallel course sections. All benefit from collegial sharing of classroom successes, disappointments, problems with students, and ways of teaching certain ideas. If you are teaching a survey course, you and the other TAs may not be expert in each content area you have to teach. If all of you are willing to admit that you don't know it all, you can help each other. There's another reason to keep in touch with what is going on in parallel course sections.
Students often compare their class sections when they are together socially or in other classes.
Attend every class lecture. There is no other way to take the pulse of your students. With the information from the lecture, you'll know where in the content you can expect questions, where you will have to repeat or supplement with examples and where you will otherwise integrate your teaching with the lecture. Decide grading policies before the semester begins. A TA's grading responsibilities can range from determining as little as fifteen percent of the total grade to determining all course grades.