Here's the short, sweet, and to the point answer: http://www.rich62.ru/lib/misc/pravila.html Go to that website, look at that chart. And when you practice try to substitute the endings. It's not really easy to study each case all at once. You can either use this approach or you could practice one case at a time. The two cases that are easiest for us English speakers is the nominative and the accusative cases because we have them in English. The harder ones are the other 4 because we don't have them.

Cases are best learned one at a time. It's helpful to learn what they do in English first. Master one case, and then move onto the next. I started with Accusative (Винительный) because it's the only case that also occurs in English in a way that changes the word. For example, the word "she" changes when something is done TO (she.) "she" becomes "her" and so you could say "her" is the accusative of "she." It's the same in Russian, only there would be five other ways to say "she" depending on what part of speech "she" plays in the sentence. It's best worked on one at a time. It gets confusing when you try to learn too many at once, but once you understand the CONCEPT of what cases really are, they become less daunting. All of the cases except for the prepositional and instrumental cases also occur in English, they just don't change how the word sounds, it just changes the surrounding words (with the exception of Accusative, as mentioned above.) So learning their functions in English first can help you understand when they're used in Russian. Genitive case (родительный) is often seen as the most confusing. I highly recommend picking up a book called "The New Penguin Russian Course." Highly highly recommend it, it will explain cases to you in a way that is coherent and relatable to English. You'll have a solid understanding of Russian by the end of the book.

Here is good explanation about the noun case system http://www.alphadictionary.com/rusgrammar/case.html Take a look at: http://www.italki.com/entry/384007 http://www.italki.com/entry/327178 http://www.italki.com/entry/132600

From my experience I can say that it comes only with time. You can't make your brain to remember all the cases but even if you could you still would forget them very soon. So my advice is to read books that you like, I mean literature and play some flash-games for remembering cases.

I am getting to the conclusion that is sometimes that comes by talking. I tried to study them by inventing words with the diffent endings of each case. It helps.