Is using a rubbish/bin bag full of newspaper balls stuffed up a non-working fireplace an adequate way of preventing heat loss from a room?

Do not put any water in the bag, and you should seal it, the same as starting seeds indoors in a small covered pot.

I believe so, doesn't hurt to try. Otherwise just give it a good wash or two.

Curtains are a good start. If you have thicker curtains on your windows, it will trap heat in the house at night, making it warmer. Putting a rug down if...

No, that is not a complete sentence and you're not supplying a purpose. Why are you doing those things or why are those things important?

Try using "Shift+Command+F." This is a command that pushes apps into full screen.

A clip is a section of video or audio from a film or audio track whereas a media file is an overall description of any item that comes under the...

Turn your brightness way down so the glow of the screen will be harder to detect.

One way is to angle it slightly left or right. This helps you find a feel and balance that is unique to you.

The raw, dried buckwheat kernels can be used, but if you already have some roasted buckwheat, you can use those as well.

Elmer's glue is water soluble so the newspaper will lose its shape if it gets wet. Two layers of newspaper will not have enough strength to hold a shape.