I’m a super adopter. I love trying out hundreds of new applications, social networks and devices every year. But not everybody wants to live the thousand-app lifestyle. For most people, the goal is to adopt the smallest number of tools necessary to work efficiently. That’s why my friends and colleagues often ask me which technologies I regard as must-haves: the tools and tactics that will make a big impact on their productivity without spending a lot of time or money getting up and running.