I save newspapers for about a year to have enough to make briquettes for the year... It takes a lot of news papers (a couple of big garbage bags full) to have enough for a good amount of briquettes.
Here I am prepping 1 inch strips of newspaper to make paper briquettes. I use 5 gallon buckets normally... the bigger the batch the easier. Try and make sure the strips are separated or they will cling to each other in the water making it hard to aerate the mixture to allow for even layering. You can use a mixer to break them down, but I am doing it this way for air pockets.