Measuring programming progress by lines of code is like measuring aircraft building progress by weight. - Bill Gates

Questions that might illuminate if there's a problem -

When's the last time you went for a walk?

When's the last time you were in nature for a while?

When's the last time you spent a day absolutely, completely relaxing?

How's your diet?

How's your sleep?

How's your sleep schedule?

When's the last time you had a vacation?

How much inspirational media have you been through in the last week - books, movies, audio, whatever.

When's the last time you hung out around or talked on the phone with someone really inspirational?

Beyond that - changing environment can bring you out of a funk, bringing a laptop to a cafe with no internet can be a great option if you can do some work offline.

“If we wish to count lines of code, we should not regard them as 'lines produced' but as 'lines spent'" - Edsger Dijkstra

I live on a boat, and sometimes I sail out, throw an anchor somewhere and just enjoy the silence for a few days. No phone, no television, no Internet. Nothing.

It's absolutely wonderful. There's time to think through problems, time to reflect on life and time to think about new ideas. I can also drink my morning coffee not caring how I look or sound.

When I come back I'm refreshed and have an inner peace that's somewhat hard to describe. But getting totally away from everything every once in a while is recommendable.