1. The object of Yardzee is to obtain the highest score from throwing 5 dice
2. Each turn you roll the dice and then score the roll in one of the categories.  You MUST score once in each category
3. To start, roll all the dice.  After rolling you can either score the current roll, or re-roll 1, a few, or all of the dice
4. You may only roll the dice a total of 3 times per round.  After rolling 3 times, you MUST choose a category to score
5. To score your combination of 5 dice, you click one of the 13 boxes, or write it on the scorecard.  Once you score that box for the scorecard, you can’t change that box for the remainder of that game

Check out this 2-minute video for a video of the rules – Yardzee Official Rules

For more printable Yardzee scorecards, click on the link here – Printable Yardzee Scorecard

Nothing, this game comes with everything you need