Final predictions as of 23/02:
UPDATE: Correct predictions in Blue. Incorrect predictions in Red.
Best Picture: Argo
Best Director: Steven Spielberg – Lincoln (Ang Lee won)
Best Actor: Daniel Day-Lewis – Lincoln
Best Actress: Jennifer Lawrence – Silver Linings Playbook
Best Supporting Actor: Tommy Lee Jones – Lincoln (Christoph Waltz won)
Best Supporting Actress: Anne Hathaway – Les Misérables
Best Original Screenplay: Django Unchained
Best Adapted Screenplay: Argo
Best Foreign Language Film: Amour
Best Documentary: Searching for Sugar Man
Best Animated Film: Brave
Best Cinematography: Life of Pi
Best Editing: Argo
Best Original Score: Life Of Pi – Mychael Danna
Best Original Song: Skyfall
Best Sound Mixing: Les Misérables
Best Sound Editing: Zero Dark Thirty
Best Production Design: Les Miserables (Lincoln won)
Best Visual Effects: Life of Pi
Best Costumes: Anna Karenina
Best Makeup: The Hobbit (Les Miserables won)
Best Documentary Short Subject: Inocente
Best Short Film (Animated): Paperman
Best Short Film (Live Action): Curfew
Total Prediction Tally: 20/24 
Viola Davis is going to win Best Actress, no question. Same for Plummer.
Have to update these soon but agree on Plummers, he has it now. Davis vs Streep will be close!