  We provide a short introduction to the one-nucleon sector of chiral
perturbation theory and address the issue of power counting and
renormalization. We discuss the infrared regularization and the extended
on-mass-shell scheme. Both allow for the inclusion of further degrees of
freedom beyond pions and nucleons and the application to higher-loop
calculations. As applications we consider the chiral expansion of the nucleon
mass to order ${\cal O}(q^6)$ and the inclusion of vector and axial-vector
mesons in the calculation of nucleon form factors. Finally, we address the
complex-mass scheme for describing unstable particles in effective field
theory.
