Good / Calm
tinker - To attempt to repair or improve something in a casual way, often to no useful effect

Mitch tried to tinker with his computer before realizing that it was more broken that he had thought, and that he had to bring it to the computer store to have a professional repair it.
contemplate - To spend time considering a possible future action, or to consider one particular thing for a long time in a serious and quiet way.

Now that Angela had graduated from college, she had to contemplate whether to get a job or get a more advanced degree.