  We present several methods to construct or identify families of free divisors
such as those annihilated by many Euler vector fields, including binomial free
divisors, or divisors with triangular discriminant matrix. We show how to
create families of quasihomogeneous free divisors through the chain rule or by
extending them into the tangent bundle. We also discuss whether general
divisors can be extended to free ones by adding components and show that adding
a normal crossing divisor to a smooth one will not succeed.
