If your studying doesn't depend on internet material or internet assignments, switch the god damned thing off!!! I'm a youtube/news websites and just general net exploration junkie, so I when I study paper material, I switch my pc off, otherwise I tend to go and check youtube for 5 minutes, only to internally scream at myself an hour later that I got distracted. And of course you mobile phone, turn it to silent and switch off mobile data so that you aren't constantly browsing twitter, facebook and whatsapp.
Also, like people said, studying with a couple of mates can be very good as you can ask each other questions and keep on the topic.
Another thing you can try looking for a particular place where you feel encouraged to study.
Me and my buddies were quite lazy until the recent few years, and last year, when we were supposed to take my O levels, we finally found a good place to study, which was actually the public library. It's quiet there, no distractions, tons of reference material, and of course, everybody else is studying too!!! So I felt as a part of an elite study junkie clique while I was there

which actually encouraged me to study. Here's some photos of the place in case you wonder why coming to a particular place can encourage you to study

(yes, the entire building is the library, so you can only imagine how much reference you can find there)
In summary:
1: minimize distractions (TV, turn your phone into silent mode and turn off your mobile data, switch off your computer unless necessary)
2: decide if you like to study alone or with friends
3: find a good place where you will feel good studying (it can be anything, ranging from a library to a coffee shop or even inside a park)