Checking an input param if not Null and using it in where in SQL Server

Question

What is the best way to include an input param in the WHERE clause but exclude it if it is null?

There are a number of ways I believe, but I can\'t seem

Answer 1

How about

WHERE (Column1 = @Var1 OR @Var1 IS NULL)
AND (Column2 = @Var2 OR @Var2 IS NULL)