Think hard before investing time in a new app
I'm not suggesting you pick one app in each category and stick with it for life. Software evolves, and it's reasonable to re-evaluate your needs from time to time — say, every year or two, or when you realize the pain-to-benefit ratio of your current solution has become too great. But make it a deliberate choice instead of just jumping at every new, shiny toy that's getting some buzz.
For a long time, I used Microsoft Word () for word processing, like most of the rest of the world. I didn't like it much, but it was the only tool that could accomplish certain tasks for me.
At a certain point, Apple's Pages () improved to the point where it that it became an even better tool for me, so I invested significant time in learning its ins and outs. A couple of years later, Nisus Software's Nisus Writer Pro (), an old favorite, acquired some new features that made it superior to Pages for my needs, and I switched again. But I won't kid you: switching a major tool like this can be time-consuming work if you want to learn it well, and it takes a while to pay off in increased productivity.
Make the choice
If you're sold on the idea of simplifying your apps, keep the following tips in mind:
Look for customizability: Extensions, plugins, and macros can make a good app great. For example, even though there are other, more powerful email clients, I use Apple Mail because I haven't yet found an email client that matches what Mail can do when tricked out with the nine third-party extensions I use.
Take advantage of multipurpose apps: The fact that an app does many things doesn't guarantee that it does them all well, but in some cases an app with several capabilities can replace several smaller apps. For instance, BusyMac's BusyCal replaces both Calendar and Reminders for me; and Objective Development's LaunchBar () can function as an app launcher, calculator, and Clipboard utility.
Sometimes you really do need two or more apps: Don't toss something that's genuinely useful in favor of something less capable solely because it lets you reduce your app count. Sometimes apps have essential features that justify their use.
Delete the rest: Once you've narrowed your apps down, get rid of the ones you don't want. (See "Stop drowning in apps" for tips.) Now doesn't that feel better?
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