Creating an acronym, rhyme or song out of important information will spark your memory and make you much more likely to remember information.
In Maths, you might use BODMAS. This is an acronym which stands for Bracket, Orders, Division, Multiplication, Addition and Subtraction.
In Music, to remember the lines on a treble clef (E, G, B, D, F), you could use Every Good Boy Deserves Fudge
In Science, you might be studying the solar system. One way to remember the planets (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto) is: My Very Excited Mother Just Served Us Nine Pies. Or without Pluto (sorry Pluto!): My Very Educated Mother Just Served Us Noodles
Check out this useful resource from BBC: a0314-bbc-bitesize-revision-planner-poster-v3-1