1) Remember that there many different techniques for learning language, and only some will work for you. For example, I haven't found 100% immersion useful. I like to ask questions in my native language about the target language. That helps me learn faster.

2) Recognize you're actually learning several skills: Speaking. Aural comprehension. Thinking in your target language. Writing. Reading. I find learning to read in the target language first to be the most helpful for my learning style.

4)This link may be helpful to start: http://www.fourhourworkweek.com/blog/2007/11/07/how-to-learn-but-not-master-any-language-in-1-hour-plus-a-favor/