Figure out what works for you and KEEP DOING IT. I added this last point in case you come up with something that works for you that I didn't include. This is my disclaimer. You will discover ideas which you may wish to add to my list. Please do so in the Comments section below.
If it ain't broke, don't fix it. If it is broken, fit it. If you find another technique that works even better, please use it over and over. Some students will swear they have to study to music, for example, and without it they can't concentrate. If you have to do that, please make sure the music had no human voices in it. Classical music is a good choice, or "techno."
I had a student with severe test anxiety. She was bombing test after test even though we covered the material she missed. I asked her what she does when she studies. She said she smoke weed. I told her to smoke weed right before the tests. Now, if you don't already use drugs, I am not recommending you start. If you already do, repeat what you do when you study for the test. This one student followed my advice and passed organic chemistry with flying colors.
Another student was a prodigious drinker. He couldn't pass his algebra class after four tries. He revealed he drank a beer while he studied, so..... I told him to drink beer right before his test. He went a little overboard but he finally past his class. He told me he stayed up all night, got drunk, took the test a little tipsy, but passed. He inherited a huge nightclub empire in Texas, as I recall. Maybe he will give me a lifetime supply of alcohol, if he even remembers college.