Sometimes a particular article is so useful to me that I feel like everyone should read it. Those go in here.
Read this immediately. Focus is at the core of everything I've ever done that's been successful. Attention is like a train and interruption will derail it. In order to get real work done, you must have focused blocks of time that aren't interrupted by anything (not phone calls, not coffee breaks, not trips to the bathroom, nothing!) Do whatever you can to spread the idea that it's rude to interrupt someone else unless you absolutely need their attention immediately.
Vim is a text-editing masterpiece with a learning cliff that will frustrate you like you have never been frustrated but reward you in the end, if you can stick with it. Try these vim related articles: