Free PDF comments: mark up documents without paying for Acrobat
Highlighting and annotating a PDF is handled by the free Acrobat Reader, Edge, and Preview on Mac. Feedback belongs in the file, not in a five-paragraph email.
524 tips · new ones added continuously
Every tip is one concrete thing you will do better or faster. Filter by what you use and who you are — or just search.
Highlighting and annotating a PDF is handled by the free Acrobat Reader, Edge, and Preview on Mac. Feedback belongs in the file, not in a five-paragraph email.
Before a meeting or a coworker pulls you away, write one sentence: what you're doing and what the next step is. Coming back then takes seconds, not a quarter hour.
With an external monitor and keyboard, a laptop can run closed and save desk space. Just change one setting for what closing the lid does.
Most people sit in their chair exactly as it arrived from the store. Three checkpoints — elbows at desk height, knees at a right angle, feet on the floor — take a minute to fix.
Default pointer and scroll-wheel speed is tuned for monitors from a decade ago. Two sliders save hundreds of arm movements a day.
A monitor rotated 90° shows a full document page, a long email, or code without endless scrolling. Windows and Mac both handle it right in settings.
No need to dig through settings: swiping on a notification on iPhone offers an hour of silence; holding one on Android turns off just the annoying category.
Stop retyping details off paper. iPhone can scan text with the camera directly into a text field; Android does the same through Google Lens.
Android can trigger battery saver by percentage. iPhone has no built-in schedule — but a Shortcuts automation turns on Low Power Mode entirely on its own.
iPhone offers to share the password automatically as soon as someone nearby tries to connect. Android generates a QR code that scans and connects.
You can't scan a code on your own screen with the camera. But you can hold your finger on it in Photos, or open it through Google Lens.
A long press on an icon opens a shortcut menu: new email, selfie, private tab, navigate home. One tap instead of hunting inside the app.
Google Messages sends a text at a scheduled time when you hold down the send button. iPhone does the same in iMessage via Send Later.
Tap the space bar twice at the end of a sentence — your phone inserts a period and a space, then capitalizes the next sentence. iPhone and Android.
On iPhone, slide your finger off the 123 key onto a digit and the keyboard snaps back to letters by itself. Gboard has a key hold or a permanent number row.
A laptop permanently docked at 100% is wrecking its battery. Almost every manufacturer has a hidden option that stops charging earlier — and multiplies the battery's lifespan.
A laptop sitting on the desk shoots your chin and the ceiling from below, and a window behind you turns you into a silhouette. Camera height and light direction fix more than a new webcam ever will.
Google Calendar and Outlook can both show a second time axis next to your own. Plan a meeting across time zones by looking, not by doing math in your head.
A cable that falls behind the desk every time you unplug it is a daily micro-frustration. An office clip and a few reusable cable ties end it for good.
The iPhone has gestures for working with text: a three-finger pinch copies, a spread pastes, and a swipe left undoes the last action.
Newer iPhones have a programmable button above the volume controls. Voice memo, flashlight, camera, or a custom shortcut with one press-and-hold.
Ctrl+click on sheet tabs groups them — and whatever you type into one gets written into all of them. Fix twelve monthly sheets in one move.
Switching back and forth between the sheet with source data and the sheet with results? View → New Window shows both at once.
Alt+;
Copying a table with hidden rows and they paste in too? Alt+; selects only the visible cells — the hidden ones stay home.
“You froze” usually doesn't mean slow internet — it means unstable Wi-Fi. An Ethernet cable is the single most reliable upgrade for calls.
Put the meeting window on the monitor with the camera, notes and materials on the other. You look people in the eye, never share anything private, and minutes write themselves.
In-depth guide · 15 min
An explainer with prompts: what it means to let AI run in a loop, what's true in the hype, what's overblown, and how to safely try your first loop.
In-depth guide · 23 min
A complete guide with prompts: Beeper unifies WhatsApp, Messenger, and Slack into one app, and Claude pulls promises and deadlines out of them via MCP on a regular schedule and writes them into Notion. Includes a patient introduction to the terminal for anyone who's never opened one.
You don't have to painfully recall every subscription you're paying for — searching payment confirmations in your inbox plus two system screens puts the list together in ten minutes.
AirDrop's counterpart is built into every newer Android phone — and with a free app from Google it sends photos and files to Windows too.