I think English is very important in our daily life especially at work and if someone can speak English and knows the four cores of English Language they would be able to speak with foreigners and can work internationally.
In my opinion, reading blogs and forums like this, can help individual to learn or either enhance their English ability but always remember that English Language has four cores and that is Listening, Speaking, Reading and Writing....
By reading blogs and forums, we can only practice reading and writing skills so as non-native speakers we should practice listening by listening to English Music or watching English movies and by practicing speaking skills, well, try to find some foreigners in your place or just speak English with family members. In this way, it can boost your confidence in speaking English Language.