If you're on a Mac I'd suggest Gasmask. It's a lightweight freeware that lets you switch between multiple hosts files right from the menubar. I have a productivity hosts file I switch on everytime I want to block social media, another one for development purposes and a standard one to revert too in case I don't want any hosts overhead and a clean default file. It's extremely useful.

https://github.com/2ndalpha/gasmask