As an add on to Tsincaat guide when uploading to TPB and Mininova consider these points.. (I've tested these - Your call to consider them or not)

Torrents In General
- Provide a Description (Gives the Legit Look)
- Space out your torrent uploading. Don't upload all your torrents very quickly. I've tested this and they ban me before i even finish uploading.
- Upload 10 per IP (5 to TPB and 5 to Mininova) - This is just what I do.. experiment and you'll find out what works for you. When i do this I have my torrents up longer.
- Uploading 1 torrent PER IP will for sure work and last much longer.

TPB
- Change your IP for every account you create.
- Also, I've found that there is a certain number of torrents you can upload after registering... Haven't found the exact number yet... But my accounts with 5 torrents in them were not banned - But the ones with 10 were (banned within 24 hours)
- When your IP is banned, you'll notice one of the two things when uploading... First when trying to upload a torrent you'll get a "database" error" Or when your uploading and you know your capcha is 100 Percent right, TPB will say "wrong code"
- You will generally more downloads from here, as they post your torrent instantly

Mininova
- I tested to see how many torrents i can upload on one IP constantly before getting banned... I got upto roughly 25 torrents in a row
- Your torrent will show up on their servers and actually be downloaded within an hour (depends really.. Just not instantly)
- For your torrents.. Do not even look at the number of downloads that they say.. It's not even close.. (I've had a torrent say 100 downloads after 2 min of uploading) And all i had were 10 peers and 3 seeders

From my experience, following these will keep your torrents up longer. I did another test where i did this to only 3 torrents. Then i seeded for half a day... I cleared all my torrents from my utorrent and i found that even today.. I had 115 downloads (and it's still early). Basically, what im trying to say here is ... Don't give up if you don't see the numbers to your likings.. Just keep uploading. Your old torrents that have been removed...may exist on smaller scale torrent sites as they scrape torrents from there and you'll get some extra torrents downloaded.