How to learn foreign language well

I have been interested in learning Italian for quite a long time and I have finally decided to take the plunge! I have found a good course consolidator voyages linguistiques angleterre , estudiar italiano en Italia and Italian language courses but I would also like to know of a Italian consolidator. Can you please help me? Also, if you are into learning languages and would like to have a go at english, I would recommend scuola lingua straniera