For psychology i find the best way to revise is break all the info down into basic points, then arrange them on an A3 sheet using diff colours. It works well because each section is divided into bio then genetics, psychological then psychoanalysis, behaviourism etc. It's kind of like a spider diagram but i just use big square simple boxes with one topic e.g. behaviourism in it. Then blue tack them next to my bed in turns. It sounds simple but i find it really helpful for gettng it all clear and organised in my mind.
And don't just copy out all your notes really small into each box. Say for clincal characteristics of depression, just put emotional, motivational, somatic and cognitive, then force yourself to think of symptoms for each category. And for genetic causes just put genetics - Egeland - Amish.
I've got all high As so far so try it!