A time management problem that people often ask me about is how to get started on a new big tasks (NBT). With a heavy number of interruptions, meetings, and so on it can be easy to get distracted and never actually start that important NBT. Starting a NBT is also a bit intimidating; it's emotionally easier to continue with checking email, answering tickets, and (this is the big one) work on less important, but easier, tasks.
When I need to start a new big task I hide. I really do. I find a small conference room, hide, and work for an hour disconnected from the internet. I'm not ashamed to admit this. Hiding really works.
I'm not completely hidden. I don't cover the windows. People can find me. My immediate coworkers know where I am.