To begin with, the most important thing to remember is that you need to keep close attention during the first few weeks of studying a new language as this is when the foundation is built. Then, what is also of great significance is to review what you have learned every day. The thing is that it is very simple to forget new material which is the reason why you should practice as often as possible.
Do not forget that it is important to engage in the learning process in any possible way. Watch films in a foreign language, listen to a podcast, read books and magazines. There are lots of ways to learn a foreign language which are both entertaining and useful.
Perhaps, the most important thing to remember in this respect is that you need to know why you are doing it. This is the best kind of motivation when it comes to learning a foreign language. When you have a clear goal, it is much easier to achieve your aim.