Take notes while you are reading. The action of writing helps you to remember. Say things out loud. Make and use flash cards and get others to quiz you on them. Make up a silly mental picture to help you to remember.
Research shows that well- rested students do better on tests.
Give yourself about 30 seconds to think about it and if it still doesn't come to you, skip it and come back to it later. If you still don't know the answer, take an educated guess. On multiple choice questions you know that one of the answers is the correct answer. Eliminate any answers you know are wrong so you only have a couple from which to chose. On true or false questions, watch out for words such as all, only, always, never, or every.