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We all have old electronics squirreled away in our drawers and closets. It’s hard to admit that a computer, phone, or peripheral that cost hundreds or even thousands of dollars years ago has little or no value. That’s doubly true if it doesn’t work anymore. Once you’ve decided to get rid of that PowerBook 520 from the 1990s or your first digital camera from 2004, resist the urge to toss it in the trash.

Long gone are the days of printing a document, marking it up with a red pencil, and sending it back to the author to input the changes. In the modern world, we use comments and change tracking to collaborate in word processors like Microsoft Word, Google Docs, Apple’s Pages, and Nisus Writer Pro. The specifics vary a little by app, but in essence, once you turn on change tracking, every change you make becomes visible to others working on the document, and they can accept or reject the change. Changes and comments can also host brief discussion threads.

Whether you have guests who want to get on your home Wi-Fi network, customers who need to join your business network, or attendees who want to use your conference network, it’s always fussy to share the network name and password. If an iPhone user has your Apple ID email address in Contacts, their device should automatically prompt you to share your Wi-Fi password, but that won’t work in many situations.