The periodic table is organised in groups and periods. The groups run along the top of the table, while the periods run down the side. Metal groups are found on the left of the table, groups of non-metals are on the right.
To remember that groups run along the top of the table, imagine a table with musical groups on top of it. Heavy metal groups are on the left and string groups (non-metals) are on the right.
Different periods of time are illustrated on the table leg, indicating that the periods are found down the side of the periodic table.