Tiffs are lossless, but they are quite a lot bigger.
Repeatedly editing and saving jpg's does degrade them.
I always keep the original when I edit a photo ('save as' under another name) and you can usually choose high quality when you save as jpg.
WPA2 hack: How secure is your Wi-Fi?
Add Depth Of Field to a photo using Tilt Shift Blur in Photoshop
iPhone tips & tricks
Les meilleures tablettes 2017