Force silence upon oneself is to shut up the mind as soon as it starts blabbering. There are means to ease this up, like counting or looking at things and focusing on their characteristics (green jacket, yellow leave, noisy car) or feeling your body (my thumb tickles, my stomach feels empty).
Just stop when the brain starts picking up from there: "My stomach feels empty (BECAUSE YOU HAVEN'T EATEN AND WHENEVER YOU DO YOU EAT TRASH)" you just stop the thought on the BE and focus on the next inner or outer thing or on the next number of the count. When you can't stop the thought on time, just ignore it and move on.
At first is hard, especially with a noisy brain, but it gets easier and easier.
Just stop when the brain starts picking up from there: "My stomach feels empty (BECAUSE YOU HAVEN'T EATEN AND WHENEVER YOU DO YOU EAT TRASH)" you just stop the thought on the BE and focus on the next inner or outer thing or on the next number of the count. When you can't stop the thought on time, just ignore it and move on.
At first is hard, especially with a noisy brain, but it gets easier and easier.