If you are serious about writing you need to make time for it. If you have a writing goal, stick to it. You can target a number of posts a day and work on it. The problem sometimes is we are always distracted for other tasks. Here are some distractions:
You mobile phone on top of your table.
Watching YouTube while writing, there is a tendency that you will be spending a lot of time watching than concentrating with what you are writing.
Watching a movie while writing. If you are watching a movie, it will take you atleast two to three hours to finish.
Chatting heavily while writing. If you have somebody on the other side and you are engaging heavily on chats, it is more likely that you will lose your focus on writing.
Browsing in Facebook.