Identify the elements present in the compound
Write the chemical formula of the compound
Determine the charge or combining capacity of each element
Use common valency rules for known elements
For ionic compounds, balance positive and negative charges
For covalent compounds, count the number of bonds formed by each atom
Use the criss-cross method if the formula is given
Check the oxidation state if valency is not directly known
Ensure the total valency balance in the compound is zero
Verify the valency using the periodic table or standard valency list