- Grammar is for communication
Sometimes students get obsessed with grammar. This is especially true for students who grew up with strict grammar schooling. Remember that you only study grammar in order to communicate. Practise with a few exercises, then write an essay or have a conversation and try to use your new tools.
- Isolate your weak points
Don't waste time on grammar exercises that you already understand just because they are easier for you. Concentrate on grammar that is difficult for you. If you are unsure of where your problems are, write a few short essays or paragraphs and ask a teacher to circle repeated errors. Then you can look up your problem and practise it.
- Teach grammar points to a friend
Find a friend who studies at a lower level than you. Teaching will force you to remember the rules and to understand them properly. Try preparing a worksheet for your friend.