As far as things invented in my lifetime (or at least became widely used in my lifetime), here are a few, and these aren't all for the better... Born in the mid 80s, by the way. I won't add things that were invented and/or popularized before I was born as that's kinda what I was born into so not life changing. That's just the way life was for me from the beginning.
Internet/World Wide Web/WiFi
PC/Laptop
Streaming/downloadable media (music, video content, ebooks, etc.)
Social media
Cell phones
Smart phones
Handheld GPS
Palm Pilot
Video game consoles
Digital cameras/camcorder
Email
Credit card
Back up camera
Walkman/iPod
DVR/VCR
Flash storage
Computer printers
Napster/iTunes/BitTorrent
CDs/DVDs
Digital wristwatch
Lithium batteries
Plasma TV
Next things I'm thinking will be added to the list - 3D printing and mRNA vaccines