Here's my perhaps surprising take on this topic.
- You need both. When performing mechanical or creative tasks - such as writing, producing, etc., I believe an atmosphere and environment of "Get the job done" calmness helps. Here, you're focusing on the tasks to be completed. To help ensure you perform better, hold yourself to account - without being self-jugemental. Help yourself achieve what you want to achieve through encouragement and support.
- However, when considering your business goals, hopes and dreams, get excited and tap into that excitement and positivity. Over time, naturally such excitement will wane, but commit regularly to remind yourself of why you are doing what you're doing. Relive and re-fuel your aspirations.