I have written before about how one free oneself from a sense of overwhelm, without actually doing anything time management related.
Instead, I have found a great deal of value from working on my thoughts.
The following article demonstrates the principle beautifully — it’s taken from the Radical Happiness blog and the article is entitled “Unnecessary Thoughts.”
Here is an excerpt: Life is never actually overwhelming because there is only so much we can do in a moment. But the mind brings ideas into this moment about what you “have” to do, what you want to do, what you’ve done in the past, what others want you to do, doubts about doing it, and ideas about any number of other things unrelated to what you are doing or need to do, which confuse and stress you out.”