Focus Challenge

Joined a program to prepare for the interviews – Algorithm & Data Structure. Its been challenging to focus. While either solving a problem set or watching a video for solutions, I lose my patience and start checking emails, social media etc. It has been quite challenging recently. Its true that I am studying after a long break and the challenge is to focus for more than 20/30 min at a stretch! I am looking into ways to improve the focus. I have been using some tools to limit the websites I can access. But somehow ends up opening them and get back to the NO FOCUS mode I am hoping with time and consistent effort this will improve soon!