Squoosh
Next time you need to compress an image, you don't have to open an image editor and do it yourself. Instead, try Squoosh which offers a simple web interface for reducing the size of images.
CloudConvert
You'll likely need to convert a file to a different format at some point. When you do, head to the useful website CloudConvert. This makes it easy to change any file to pretty much any other format.
ManualsLib
ManualsLib is an excellent resource for finding instruction manuals online. Just input your device name and model to search for manuals.
Jitsi Meet
Simply come up with a room name, send the link to your friends and everyone can join without signing up or paying. It's as easy as online meetings get yet is surprisingly still a mostly unknown site.
AlternaiveTo
Ever find an app that you want to use, but it's too expensive or doesn't work on your platform of choice? Simply input an app or program and the site will suggest similar alternatives. You'll find both free and paid options.