I would recommend Mr Bruff on youtube - he is probably the main reason why I did so well in my GCSEs last year. You should try to get to know the AOs of your exam board so you know what examiners are looking for.
As for revision, figure out the main themes and characters of each text and find about 5 quotes for each, and memorise these quotes. The quotes must all contain a solid technique - like metaphor, alliteration, etc, so you have something to write about. Also, to get the higher band you need to look at structure and sound - so look out for sentence lengths, monosyllabic words, punctuation, etc.
Try to do practice essays and give them to your teachers to mark (if they're kind enough!). Good luck!