I fine-tuned the television to make the picture clear.

He tuned in the sound of the guitar.

It's important to believe in yourself.

She uploaded a selfie to Instagram.

She took a selfie and uploaded the photo to social media.

He likes talking about himself and often talks about his experiences and thoughts.

He set out on a journey of soul-searching.

Since that's his own concern, we better not interfere.

He should stop his selfish behavior.

He starts talking about himself at every opportunity, causing trouble for the people around him.