Being a professional Event Planner is a tough job. Not only do you have to be able to multitask, but you also have to deal with a never-ending stream of requests. How quickly you respond to requests depends to a large degree on how quickly you can access accurate event information.
Anything you can do to improve your ability to save and access accurate event information will save you time. Your client wants the best event for the budget, and if you can save time dealing with the day to day event tasks allows you to focus on actually planning a great event.
A lot of software vendors will try to sell you a system to solve this problem. While some of those systems offer great tools, unfortunately they often deal with only one aspect of event planning, such as the RFP process, online registration, mobile attendee information etc. And while those are useful tools, they ignore the fact that events are all of that and more. Like other large projects, coordinating a major event can involve coordinating a 10′s or 100′s of vendors, hotels, venues, types of attendees, and organizational constituents such as VIPs, board members etc. Planners are often left to organize critical event information using nothing more than email and the files on their computer.