Some general tips for an optima workstation sitting posture:
You should have head over your shoulders & not lean forward. - Hardly lean forward...leaned sideways, sometimes.
Your arm should be relaxed by your side. - I keep myself relaxed as far as possible
Fore arm should be parallel to your side. - Need to move my arms a lot, so...
Your wrist should be neutral. - Well..as I continously have to use my hands, i guess its always neutral
Your fingers should be relaxed. - Relaxed on the keyboard..never typed loudly
Your lower back should be supported by the backrest of the chair. - The backrest of my chair is very supportive
Your knees should be lower than your hips. - Either of the legs are always lower
And the feet should be flat on the floor. - Rested on my foot port