In this talk I shall describe two kinds of soft matter system in which the interfacial behaviour is of interest. Firstly, the adsorption of polymers and peptides on solid surfaces is of growing interest because of the possible applications in biotechnology. We have recently improved a Monte Carlo simulation method for studying lattice polymers near to surfaces, and I shall present some recent results. Secondly, I shall discuss the simulation of confined liquid crystals, with special emphasis on hard platelets. These idealized systems may be related to experiments on colloidal suspensions.