Collaboration on Web search is common in many domains, such as education and knowledge work; recently, HCI researchers have begun to introduce prototype collaborative search tools to support such scenarios. We analyze data from a collaborative search experiment, and based on these data we propose three techniques that can enhance the value of collaborative search tools using personalization: groupization, smart splitting, and group hit-highlighting. Author Keywords Collaborative search, web search, group search. ACM Classification Keywords H5.3. Information interfaces and presentation (e.g., HCI): Group and organization interfaces