Random dice tables may seem like a strange thing to publish but once you have used one, you may never want to go without again. A page of random dice rolls lets you play a game in places where rolling dice is not an option. When you are behind a GM screen you can make entirely secret rolls, even the idea of you made the roll is hidden from the players. You can use countless random tables, whilst improvising madly, and to your players, they will never know you were making it up on the spot.
Need an NP on the fly? You can just read their characteristics off the next few columns of numbers. Need a telephone number for a secret contact, just read down the column.
Most of these tables are organised into blocks of three numbers. This is more for your memory's sake, and has nothing to do with any intended game rules.