There's some close calls on this card, and I may be going with a few favorites, but here's my thoughts.
Sorry for the novel. lol
Couture/Nog - I think Randy has this fight pretty much in a lock. While a lot of people are inclined to disagree, and think Randy is on his way out of the game... I don't think so. Nog is the younger fighter by I believe 13 years ( Being only 33 ) but he appears so much older in many of his fights... Perhaps because of the numerous beatings he's taken over the year, even though he's easily one of the top heavyweights in the sport.
I basically think Randy is going to keep the fight standing, and probably clinch and put Nogueira up against the fence and do some dirty boxing in the process. Nog has great boxing, but I just don't think he's going to be able to handle Randy's clinch work and avoid taking damage standing and against the fence... I also don't think Randy is too afraid of Nog's submission game, but we will see.
Either way, this fight is a win win. I'm rooting for Couture, but I wouldn't mind seeing Nog win at all.
Jardine vs Silva - This one is kinda close, but I just think Jardine is going to come in after his last loss and make up for it. He'll probably get a decision, I just don't see Silva overwhelming Jardine in any way. Jardine will probably keep this standing as always, and work his way to victory. The guy should really diversify his game.
Leben vs Rosholt - Unless Rosholt comes in super game and with decent strikes to back up his takedowns, I think Leben should be in for an easy night. Although, if Rosholt does land his takedowns, and maintains top control, he could win. I'd still put the fight in Leben's hands, personally.
Marquardt vs Maia - I think Nate the Great is in line to get another crack at the title, and unless Maia lands something super slick ( Which is very possible ) Nate should be able to TKO his way to a V. Don't be surprised if Maia pulls sweet sub, though. I just don't think Maia is well rounded enough to handle Nate's solid striking and all around game.
Vera vs Soszynski - I really like Soszynski in this situation. He's got great hands, shouldn't be intimidated by Vera on the feet, and provided he follows a solid gameplan and gets the fight to the mat, he should be able to win this one. If Soszynski for whatever reason decides to stand up, though, he could be in for a short night. Still, I think he's got a pretty solid lock on the fight. I'm hoping for another kimura win by him.

Vera has been a golden boy for a long time now, but has never really delivered in terms of potential. I think he's gonna fall short on saturday.
Gabriel Gonzaga Vs. Chris Tuchscherer - Tuchscherer has been fighting on smaller circuts for awhile and has some solid wins, but I think he's just going to be an easy first round victory for Gonzaga. He's just not on the same level... But still... It's nice to see a new HW in the division.
Those are all the ones I care to have an opinion on for this card.
Randy/Nog is pretty even money, as are most of the other fights, so if you bet with a friend, I wouldn't worry about laying any other odds.