Remove unnecessary dashboard apps
On a Mac, delete any widgets you don’t regularly use from the dashboard. Running them in the background is a waste of your computer's brainpower, and honestly, when was the last time you looked at that stock ticker?
Buy an external hard drive
The 400+ photos from your vacation in Cabo that you took 3 years ago aren’t doing you any favors -- in fact some are borderline incriminating. But if you insist on keeping them around, consider offloading them to an external hard drive. You can easily track one down for under $100, and it's the best solution for storing music, videos, and other storage-hogging media.
Make sure your software is up to date
Those incessant pop-ups asking you to update your software aren’t just there to annoy you. And even though they take for freaking ever, they’re worth it. To check if what you’re running is up to date on a Mac, go to “Apps” under the Apple icon menu and click on Updates. On Windows, click the Start Button > All Programs > Windows Update > Check for updates.