honestly, when I was revising I used the sitting next to a parent/in a public place method because I felt like if people were looking at me then I'd actually get some work done otherwise it would be embarrassing sitting with a textbook open and being on my phone lol. I revised very last minute for my GCSEs and I was the same!! ended up getting 9,9,9,9,9,9,8,7,7,6 after being predicted mostly 6's and 7's and only 9's in English lit/lang!