Find a store that won't be doing preorders and camp it out early that day if midnight release, or early morning if opened normally.
That's what I had to do with the Wii.
Found a Best Buy that was going to have 120 Wii's but was taking no preorders.
Got in line 2 am, store opened at 8, got Wii #22 and got the last Classic Controller. :3
+200 people in line once I walked out the store.