The following are a number of study tips. Some are ‘truths’ and some will or will not work for you. Which ones do you think are ‘truths’?
Pay attention in class - often there is one key message or point to the lecture (perhaps 2-3) - at the end of the class write down what this key message or point was. Make sure you understand it. Confirm or review with the instructor if you are not sure. Always check your assumptions.
Really, really pay attention in class - what does the instructor repeat, what language is used (must, should, important, useful, critical, etc.) - this stuff is likely to be important, very important (think tests).
When doing a practice session, make it a REAL practice. Take the old exam, find a quiet place like the exam setting, give yourself the same amount of time and resources then try it start to finish - like a real exam. Use a reasonable time of day (e.g., not 2 or 3AM). Create the same pressure. Use the same aids. Same type of calculator. Same formula sheet. Closed book is closed book - really. Then, and only then, look at the answers or talk to others.
If you have problems memorizing, create stories in your head about what you need to remember, craft mental cues, do more background reading so that you know and understand what you are asked to demonstrate, not just the ‘phrase’ or ‘definition’.
In some cases, using the electronic tools is not the best way - writing things out by hand repeatedly can help vs typing it once or just taking a pic of the board. Writing a summary vs reading a summary forces different mental processes to kick in and this can create the necessary linkages for understanding and remembering. Hand drawn mind maps, fishbone, or KJ diagrams can also help (all are kinda the same if you think about it), using acronyms - whatever works.
Do not study for long periods without suitable breaks.
Do not study when you are tired and bouncing your head off the keyboard.
Try to relax and not to study the night before or same day of the test - either you know it or you don’t. Skipping other classes (physically or in thought) is really bad. If you study and think about the material during the term, and deal with what you do not know when you should, you will not need to panic, cram, or pull all-nighters.