I'm not an expert but my ratio is always between 50 and 100.
Remember you get credits for having torrents seeding, even if no-one is downloading them. If you have 300 torrents seeding, big or small, you're earning 100 credits/hr; 2,400 credits per day; 16,000 credits/week.
You can 'buy down' your ratio at a cost of -10 gb/6,000 credits. This means if you were seeding 300 tiny torrents, you'd be able to buy your ratio current ratio down to 1:1 in less than two weeks.
One really simple thing to do is download a bunch of small freeleech torrents (PDFs, say), and leave them seeding all day. Not a panacea, but it will help.