A summary of recent theoretical and experimental work on thermoelectric and related effects in superconductors is given. Whereas this field for a long time was characterized by large discrepancies between theory and experiment, more recent experiments confirm the theoretical concepts. Experiments which investigate the difference between the electrochemical potential of excitations and Cooper pairs (charge im balance) play a prominent role. They allow one to determine the thermoelectric transport coefficient. Also a new type of thermoelectric effect is discussed: a charge imbalance is created if a supercurrent is flowing in the presence of a temperature gradient.