Contributing to the growing literature on the memory-activism nexus, this article analyses how activists remember past activism. For social movements and activists, memories of past mobilisations represent both an asset and a burden. This article seeks to contribute to existing research on memory in activism by identifying recurrent patterns of how activists remember and forget previous mobilisations across different movements. Based on interviews with activists of the Global Justice Movement (1998–2007) and the Blockupy movement (2012–2015), four mnemonic modes are identified. These entail two types of mnemonic adoption, which highlight continuity with a positive or negative valence attached, and two types of mnemonic rejection, which highlight discontinuity with a positive or negative valence attached. I show how similar patterns of these mnemonic modes can be found across the two movements and their diverse subgroups. At the same time, however, these mnemonic patterns differ depending on the degree of activists’ identification with the overall movement; while activists who strongly identify with the movement in question remember failures of past mobilisations and their differences to current ones more clearly than similarities and successes, the opposite is the case for activists with low identification attachments.