Ever shake your head when you open your Gmail inbox? Probably because you know it’ll take time to pick through your new messages and build your to-do list. But with ActiveInbox, you can have all those task management functions right there in your Gmail account.  So right now, snatch up a three-year subscription to ActiveInbox for just $43.95 — 63 percent off its regular price — from TNW Deals. ActiveInbox works by turning your inbox into a revved-up to-do list — allowing you to easily prioritize, create tasks for, and annotate each email as you work through your unreads. Organize…

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