Everybody is different. Personally, I can't keep multiple things in my head at the same time very well. I need to focus 100% (or as near to 100% as possible) on

Everybody is different. Personally, I can't keep multiple things in my head at the same time very well. I need to focus 100% (or as near to 100% as possible) on the task at hand. If I'm focused on solving a problem and somebody comes up to my desk to ask a question=, it's very similar to that xkcd comic where the mental bubble goes 'poof' and I'm back to square one.