How do you stop yourself from feeling overwhelmed by all you need to accomplish?

Herbert Wade
There are times when I start obsessing over the fact that I’m still not where I’d like to be and that it’s a long journey, but in those moments I found it best to remind myself how I felt last time I only worked for a short time and made a progress that pleased me. I then remind myself that if there’s enough of those small accomplishments, I will find myself in a completely different place. It’s best to be mindful and not worry. Tell yourself a compliment. Take deep breaths. Be grateful for being where you are and who you are.

David Rice
You need to write it and choose one or two most important things which are most important to you in long term and right now and start working on them.