I come from a private school where speaking in English is encouraged at all times except during the subject Filipino. I grew up as a Filipino whose first language was English. I was very disappointed with myself, ashamed of not being able to speak my country's language. What did I do to solve my predicament? I watched telenovelas on GMA 7. Seriously. It helped me a lot.
If you're planning to do the same, don't forget to search words you don't understand and record them in a notebook so you can remember their definitions.