[nyrulez]

Great advice all around.

Some advice that may not be obvious:

Keep extensive notes about stuff that you refer to repeatedly. This may include code snippets, test examples, shell commandlines, and so on. Over time, a good programmer can accumulate their own library of stuff that helps them execute effectively.

Meditate for at least 5 mins. Self explanatory. Productivity is directly proportional to your ability to manage distractions. Meditation is an effective tool.

Pace yourself. Just like in a marathon, you keep a steady non peak pace, it can be useful to allow yourself some patience (vs being hurried all day) , take some breaks, and take a few deep breaths here and there in your schedule, to let your mind reduce hyper activity and let it be more centered.

Have a good learn list. When you got some spare time, you can refer to it to learn something in your field... Remember knowledge is a key component to productivity.