Group cards on the tableau down in suit from King to Ace. Groups of cards, regardless of sequence, can be moved if the top card of the group is 1 lower in value than the card you are moving the group to.
Try to build a house of cards. Make sure the foundations and lower layers are strong enough to support higher layers. Walls are pairs of the same value or suit. Roofs can be any card. Walls of 20 and 21 in value have special capabilities.