Revision: What method of repetition helps you remember things more effectively? Speaking, Writing, or Reading?

I'm doing my final year on GCSE's (Year 11) I get all sorts of advice, people telling me to write out the key facts I need to remember over and over every day. Some say I should say them over and over to myself (out loud). And others say I should just read them over and over. Which one do you think is more effective? Which works best for you? Why? Or should I just attempt and do all of them.