1. Quit multi-tasking
This one's tough, but it's crucial when you need to get down to business. Like an athlete, your brain adapts and expands as a result of its training, so if you're constantly pivoting from one activity to the next, your brain will grow accustomed to being interrupted, and as such, have a harder time honing in on one activity.
2. Shrink your mental deadlines
As any procrastinator will freely admit, nothing dials up the focus (and often, quality of work) like a deadline. To light that fire artificially, experts suggest you determine an amount of time a particular task should take you, then shave it down. For example, if that proposal you've been meaning to finish should take you an hour or so, set a deadline of 40 minutes and stick to it. The self-imposed ticking clock will subconsciously help you better focus.