I am installing gentoo and you want me to email,dm, text message or airdrop links?
Ok, maybe you mean mobile only: i have a wifi only android phone that I don't use email on, none of those options work.
QR codes work for me PC -> mobile ('Create QR code for this Page'), but I haven't really pursued the other direction... I usually post to Twitter and delete it to get the t.co link now that goo.gl is done.
Bit.ly is faster than opening up a camera app for me
Firefox has a feature where, if you're logged into firefox, you can see what tabs are open on your other browsers. It makes sharing links across computers trivial.
You can also right click a tab and directly send that tab to another device.
Chrome has a similar feature when sync is enabled: the "tabs from other devices" section of the History page (Ctrl-H). The context menu for tabs also includes an option to send the tab to another device.
You have to login with the same account, biggest drawback.