Studying is something non-existent to me. I just can't be bothered. I plan to at least do the work given by my teachers and limit my studying to just that.

Will it be enough? Any tips?

Oh man. I NEVER studied in highschool and somehow managed straight A's. So I'd say what you're doing now is enough for highschool.

However, if you plan on going to college or are in college, it's a different story. I struggled SO much my first semester in college cause I had no idea how to study. I never did it before! And it's hard for me to sit down and focus my attention to study. So here's what I do if you wanna try some of these things out:

• In class, I jot down things that seem important. I don't write everything down so I can pay some attention to my professor instead on focusing on writing, writing, writing. These notes don't have to be pretty or organized. Just get things down in any way. (My rough notes usually... have some profanity)

• Do all homework assignments. If it's something like math where you show work, write down the problem and the steps on how to do it in a separate notebook.

• As the exam gets closer, rewrite your notes for what will be covered. Make it look pretty and organized. Color coding really helped me remember stuff, and graphs, charts, and diagrams are especially helpful! Fill in the blanks from your rough notes to make sure you get everything down that you didn't before. This helps you think about what's important and what you should actually know.

• Redo some homework problems! This is a great way to practice. If you get stumped, you can look back on your homework notebook from before to see what steps to take.

• For some subjects, I'd study in a small group of other students in the class. (Probably not friends, unless you know you will be productive) I did this for my digital circuits class, and I know for a fact that without their help, I'd fail it. They helped me understand some materials that when the professor explained them, I was completely lost.

• It never hurts to take practice tests. Searching online can get a few, but my professors would often post their own for us to take if we wanted.

Those things helped me a lot my second semester, far more than cramming last minute and rereading the textbooks (which is what I did my first semester, do not recommend). I learn by DOING more than SEEING so writing info and working out problems, and then redoing them did more for me than anything else I've tried. Hope this can help you too!

I guess I can do what I said as for now. Thank you very much for the lengthy advice. I will apply them when I'm in college. Now, I just have to stop being lazy and do it...

Copy out your notes, word for word, and neatly.
That's how I revised and I got over 90% (that's more than an A) for damn near every exam I've done thus far.