I want to improve my English diction; how many words I need to memorize per day? How to select them?

I find it is good to get an English dictionary and read a section everyday of a newspaper or book, or magazine.It is good practice to read aloud to hear your own sound.Also every week learn 5 new words and how to use them. Then at the end of a year you will have really picked up much more. English is my first language and I am teaching myself some Spainish. I find writing the words I learn is very important.One more thing I do is look at movies in the language I am learning, and put sub-titles on the bottom of the screen in English.I hope this helps you.