Unlock Secret Characters:
Create a player with one of the following as his last name. The character will be available in the free agent pool. (Note: Enter these last names in lowercase.)

posneghx - Mario Austin
skenxido - Malick Badiane
zxccvdri - Sani Becirovic
bbvdkcvm - Matt Bonner
sdfgurkl - Carlos Delfino
SOSODEF - Jermaine Dupri
pockdlek - Andreas Glyniadakis
oeisndla - Kyle Korver
nbvksmcn - James Lang
qwpoaszx - Paccelis Morlende
whsucpoi - Aleksander Pavlovic
poilkjmn - Rick Rickert
ioubfdcj - Sofoklis Schortsanitis
xcfwqase - Tommy Smith
poioijis - Szymon Szewczyk
zxdsdrke - Nedzad Sinanovic
itnvcjsd - Remon Van de Hare
wmzkcoi - Xue Yuyang

Unlock Special Shoes:
Enter these NBA Codes to unlock special Nike shoes (the colorway style are in parentheses):

Air Flight 89 (3)- GF9845JHR4
Air Flightposite II (2) - 2389JASE3E
Air Foamposite Pro (1) - DG56TRF446
Air Foamposite Pro (2) - 3245AFSD45
Air Foamposite Pro (3) - DSAKF38422
Air Hyperflight (3) - A0K374HF8S
Air Hyperflight (4) - JCX93LSS88
LeBron James' shoes - 23LBJNUMB1
Shox BB4 - 424TREU777
Blazer - XCV6456NNL
Air Jordan III - CVJ554TJ58

Free Agents for Draft Picks:
After your first season of a dynasty and after the first offseason, the premium free agents will still be available. Sign them for 1 year minimum and then trade them for a first round draft choice.

Cheat List:
Go to My NBA Live, then NBA Codes. Enter the following codes to unlock the corresponding stuff:

All Hardwood Classics jerseys: 725JKUPLMM
All NBA gear: ERT9976KJ3
All shoes: POUY98GY5
All team gear: YREY5625WQ
Store points: 87843H5F9P