I have been studying intensely for just over a year now and might be just getting to the "intermediate blues".

My suggestions are to ensure that you are doing something every day to maintain contact with the language. 2 things I attempt to do every day: 1, review some vocabulary flashcards (I highly suggest the Anki application). Personally, I chose to make all my flashcards on my own so I can include usage notes and learn words in context. Whenever I come across a new word, I make a flash card (currently approaching 9000 after about a year, yikes). I review about 250 separate cards every day and "learn" 21 new words everyday. For me, it is important to ensure that the words you are learning are very fresh in your mind. Frequently, I will start my day off by listening to 3-4 podcasts on here, making flashcards for new words encountered, and then study those flashcards later that day.

2, I try to electronically write at least 200 characters everyday in a journal format. I believe in the cathartic process of writing about your day in general, but find attempting to put my thoughts in Chinese forces you to discover the gaps in your ability.