How to prolong battery when Macbook Pro gets heavy use?

Hi guys,

I've got myself really confused on how I should best treat my rMBP's battery for maximum battery life. My 13" mid-2014 Macbook Pro is roughly 5 months old and has 127 cycle counts on its battery already. This is my only computer and I basically use it like a desktop, it gets heavy use daily. On the system report these are the stats at the moment:

Charge Information:

Charge Remaining: (mAh): 5564

Fully Charged: No

Charging: No

Full Charge Capacity (mAh): 6053

Health Information:

Cycle Count: 127

Condition: Normal

Since buying it, I have mainly used it on the battery, as I thought keeping it plugged in all the time was bad for the battery. Most of the time, it has pretty much gone through a full discharge before I've recharged it (I'd usually let it get to 20% before plugging in and it has got into the red fairly frequently before recharging too). I stream a lot of content - Spotify for music and Netflix for movies as this is basically my TV as well. So, I guess my question is, taking into account the heavy use and streaming, how should I best look after the battery? Leave it plugged in (I'm mainly at home so always have access to power)? How low should I let it get before charging? Is having 127 charge cycles on such a young mac not the best reading? I've installed Coconut Battery to get another take on the reading but I'm not sure what this means. Here is the reading:

Curent charge: 5644 mAh

Maximum charge: 6050 mAh 93.4%

Design capacity: 6330 95.6%

The numbers for this keep changing as it's discharging as I type. The battery percentage according to the mac itself is 97% at the moment with 10:43 remaining on the battery, though this keeps fluctuating quite drastically at the moment. Can anyone offer any advice? Is the battery holding up pretty well or should I change the way I charge it?

Thanks!