To understand how and why individuals make use of emerging information assimilation services on the Web as part of their daily routine, we combined video recordings of online activity with interviews of 11 experienced Web users. From these observations, we describe their choice of systems, the goals they are trying to achieve, their information diets, the basic process they use for assimilating information, and the impact of user interface speed. Author Keywords Augmented information assimilation, long tail, information diet, social web, information foraging theory, sensemaking, Web 2.0, social bookmarking. ACM Classification Keywords H.5.3. [Information Interfaces and Presentation]: Group and Organization Interfaces ? theory and models, webbased interaction. H.4.3. [Information Systems Applications]: Communications Applications ? information browsers.