Decide a few days ahead which class and which period you're going to skip. For example, you might decide that you're going to skip French next Wednesday, 3rd Period. When choosing the class you're going to skip, take a few things into consideration.  Think about whether or not the teacher takes roll. It is best to know which teachers do and don't take roll in their classes. It is easier to skip classes where the teacher does not take roll because you are far less likely to get caught. If they do, you could try to sneak out of class after being counted present for attendance. Also consider what your teacher is like. It is easier to skip classes that are taught by more relaxed teachers. Never skip a class taught by a teacher who is likely to look for you or ask after you. It is important to think about where your class is located before you decide to skip it. If your class is located near an exit that is not locked, it's an ideal skipping opportunity. However, if you have to walk past the principal's office to get to an exit from a certain class, you should probably reconsider your plan to skip. It is best not to skip the same subject too many times. Choosing to skip a class that you have not skipped before gives you a better chance of not getting caught. Skipping class is not always the best option. If you get caught, there can be serious consequences - both at school and at home. If you miss class, you'll have extra work to make up. Think about why you want to skip and decide if there is a better way to accomplish what you want to do. For example, if you want to skip class because you forgot to do your homework that is due today, maybe you could talk to your teacher instead and convince them to give you an extension. That way, there is less risk involved for you.

TL;DR in Indonesian:
Pertimbangkan guru. Pertimbangkan lokasi kelas. Pertimbangkan riwayat bolos. Putuskan apakah bolos merupakan hal yang memang harus dilakukan.