Currently, my level of Russian isn't fluent although, admittedly, I left it dormant for long periods. I'm at the stage where my best bet would be to watch films. One good thing about Russian I found is you can easily watch good films, on yandex with Russian audio. I have one on DVD called Noch Nastupayet (also with Spanish audio). This was about the tooth fairy that haunted those who see her face. The dialogue was all pretty basic vocabulary.Interesting, my experience is the opposite. I’ve been at it for over ten years now and I still don’t understand Russian fluently. On the other hand I noticed Latin came much easier to me after I started Russian. It was much easier for me to "think" in declensions, because that’s what Russian forces you to do all the time and you get a lot more exposure to this system than from Latin alone.
I think this is a great point, I tend to agree with it, but what bothers me is that I don’t know of any language that has evolved from prepositions to declensions. It’s always the other way around (correct me if I’m wrong).
The real simplification would be to simply juxtapose the possessed thing and the possessor, like in modern Arabic (trunk - the tree) and many other languages.
Highly recommended is Karnaval Dush (Carnival Of Souls) fully available in Russian on YouTube. A 1962 psych thriller that has a cult following.
Beyond that, living in the country will polish your Russian. Not that it's the same as in the 1990s.
If you hear the language, the accent reminds you heavily of Russian (no wonder there), but it's a very different animal.