@fabr6 : I should add that there is one more option to help you with your ratio, and that is to donate money to the site to help pay for the servers that we are using. For every Euro that you donate, the site administrators will add a certain amount to your upload statistics.
Even better, right now those donations get extra credit due to a special offer that site administrators are running. If you donate 10 Euros, for example, they'll add 50 GB to your upload stats. Donate 20 and you'll get 120 GB.
Click on the Donate link at the top of your screen for more info.