Unfortunately, I discover sometimes that I’m still blockedstuck.

If you want to express that you sometimes still make the same errors, it's more common to say that you're stuck rather than saying you're blocked.

Using cCorrections to sStudy

In English, the first letter in every noun, verb, adjetive, adverb, etc., in the title is capitalized.

I am really grateful every time I receive a correction fromon this website, because ithis allows me to improve.

"I am" is often said/written as "I'm".

I read it carefully and write it down in my notebook, making sure to correcting the mistakes with the right form.

"With the right form" sounded a little odd to me.

Sometimes I need to consult other sources to understand the main problem, not only focusing on the received explanas the received explanation doesn't provide enough information.

"Main" sounds a little odd here.

I could understand what you wanted to say in the last part of the sentence, but it took me a while, so I rephrased it.

Generally, I use a grammar book.

Currently I don’t use flash cards, but I'm thinking about using a homemade tool, such as an Excel sheet with some macros to simulate a flash card, as a substitute.

I think it can work for learning vocabulary, because using a fun approach is more motivating than learning something by heart.

Unfortunately, I discover sometimes that I’m still blockedstuck.