Many gaseous particle detectors are or will soon be coping with unprecedented high rates and integrated particle fluxes. After many years of R&D work to ascertain and optimize their behaviour it is still nowadays an open question whether present designs will perform as desired. Complex ageing problems might degrade their performance in a irreversible manner. Many data and observations from different groups are contradictory, not comparable or difficult to extrapolate to final running conditions. The International Workshop on Aging Phenomena in Gaseous Detectors, held at DESY in Hamburg, reviews the progress in understanding ageing effects. This review talk compiles and works out a set of recommendations such as gas mixture, assembly materials, operating conditions and others, to minimize ageing effects in state-of-the-art and future gaseous detectors.