Improve My English

I have this sudden urgency to improve my english because I realised I send important emails more often now. These emails are not just to customers and internal team mates.. quite a number of them are to the executives / higher management. I run out of vocabs sometimes and I can’t seem to express my thoughts properly nowadays. I don’t like to sound like a 21-year-old-just-fresh-out-of-school-girl. So I’ve decided to spend a little bit of time each day to do some reading. Hopefully it helps.