How to maximize seeding?

[martinobergman]

I have a problem with my upload speed. 

My Internet upload speed is 6 Mbps ... but I am uploading at 100 kB/s .... should't I be uploading at 768 kB/s ???? 

I am seeding 25 files , so it is not about the low number of peers requesting the file.

Can anybody help me to improve it ??

Thank you