Mindfulness is simply a matter of practice. You were once very, very mindful for the first year or so of your life, then you were taught to separate yourself from everything else and center your thoughts on you.
The more you practice watching and learning the more you will head back to that first year. Learning does not have to be large or complicated. When you come home from work learn where you put your jacket, wallet and keys. Before you go to be learn where you laid your eyeglasses. Learn someone's name etc.. When you are washing dishes look at your hands at work, look at the dishes as they are picked up, washed and put on the rack. Stop and learn the way you are sitting or laying or walking. Then forget those things and look at the grass and sidewalk and clouds and telephone wires.
Thinking is man's worst enemy, it has taken over and although the men it is attached to are alive it works tirelessly to destroy those men and all of life. Silly huh? Thought it to be used like a screwdriver, taken out of the toolbox when it is complimentary to life, but stowed back away when it is not needed, is destructive or is not practical. If someone throws a brick at your head and you think about it then it hits you, but if you move without a thought then you are saved.
Realize there is no free will. Left alone your body will function like a plant, moving towards what it needs to live, retracting from what harms it. Your thoughts are also the same as a tree, moving towards what perpetuates them and away from that which destroys them. Because thought has separated itself from life and forgot it needs life, it can destroy it. This is what ignorance is. Anyone can see that things that work in harmony continue, things that work against each other decay. The ego has forgot what it is, had made up new identities for itself, new divisions and set them against each other.
Once you see what you are then you are free of all this. You will be part of the whole again and you will execute your nature. Thought can be played with like a toy as long as it is not mistaken for what is real.