Always desire to learn something useful.

There are many types of learners: kinesthetic, auditory and visual. Depending on the type of learner you are, you should follow different ways of learning.
But for example if you want to look for a word in a dictionary or you need some grammar exercices, on the internet, there are some pages that are really good and you can check out whenever you need, and it doesn't matter what type of learner you are.
The bilingual dictionary which is really good is the: wordreference.com You have the pronunciation in the american and british accent, you have of course the meaning and some examples to make easier for you to understand the word. The Layout is quite simple but nice at the same time.
If we talk about monolingual dictionaries, the best would be: macmillandictionary.com In this dictionary it explains you what the word means with good examples, it also tells you if the word you are looking for has a lot of people looking for it or not. And in the same as the bilingual one it tells you how the word is pronunced,

The best grammar book in the internet would be: manythings.org/e/grammar.html  Because it has a clear index, which is really good if you need to look for specific things. It has also examples in context which help you better to understand what you are studing. This grammar book has execrcices and the answers of each, and other things that this has are games. It's a good grammar book because it contains anything that you need plus the games.

So these would be the the dictionaries and the grammar book that are the best for studing English even though if you are: Kinesthethic, auditory ot visual