Have you felt proud of yourself because you could multi-task two or more things? As a programmer, I have also tried to do two tasks simultaneously. I naturally had a lot more items in my todo list and I tried to complete them all at once. I felt multitasking was the only way to improve productivity in work.
While my code is building or page is refreshing, I would quickly work on a different project or switch to a different tab on my browser to catch up on Reddit or Twitter. Or try to send an email.