  In this paper we continue our systematic study of form factors of half-BPS
operators in N=4 super Yang-Mills. In particular, we extend various techniques
known for amplitudes to the case of form factors, including MHV rules,
recursion relations, unitarity and dual MHV rules. As an application, we
present the solution of the recursion relation for split-helicity form factors.
We then consider form factors of the stress-tensor multiplet operator and of
its chiral truncation, and write down supersymmetric Ward identities using
chiral as well as non-chiral superspace formalisms. This allows us to obtain
compact formulae for families of form factors, such as the maximally non-MHV
case. Finally we generalise dual MHV rules in dual momentum space to form
factors.
