Talk often!

When you talk with someone in english, you will be able to learn how good your grammar really is. When you are talking you need to conjugate verbs in the correct tense or else the other person will not understand your ideas.
Try talking with native english speakers. Ask them to correct your mistakes during the conversation.
This will really improve skills.
It is normal to make mistakes when you are starting to talk fluently in english, so don't be shy!

In this video you will find daily expression to use in your conversations.