See also the Drag and Drop video Tutorial.
Simply drag and drop the widget from the dashboard to the page.
In order to put the widgets in your desired place you have to always drag the widget towards the center of the other block you want it to be near. For example if we want to place two widgets side by side, we have to aim at the center of the widget and place the cube.
In the following image you can see how you literally drag and drop the cubes on top of one another like Lego. Of course you must remember to aim your mouse towards the other cube so the system will know which cube you put your widget on top of.