Many people are attempting to figure out how to do the positive prestige token glitch, as opposed to being possibly banned by Infinity Ward for doing the negative token glitch.

First off, how do people know there is a possibility of a ban? Robert Bowling posted on his twitter that "Possibly, 2 day bans and stat resets to all prestige token glitchers."
However, bans have not been handed out for such things yet.

But, to the glitch. Keep in mind, it may still be possible for IW to see that you've done this glitch.
If you're gaining tokens without prestiging, it looks kind of fishy, eh?

Positive Token Glitch Steps:

What you need:
Level 80 account
The Gamertag you want to add tokens to.
A friend on another xbox

1) Go into a MW3 Party with the account you wish to add tokens to and the level 80 account.

2) Have your friend on another xbox invite you to their MW3 Party.

3) Once in your friend's party, on the level 80 account, go to "Barracks", "Prestige Mode", "More Info", and finally "Last Chance."

-----You should now be at a screen that says "Last Chance" and has the prestige or rank emblems. Hover over the "Cancel" option, and have your friend on another xbox go into a Team Deathmatch lobby.

**Directly after, he must back out, much like the negative token glitch.

You should now be in a MW3 party once again.

On the controller for the account you want to add tokens to you should be able to select the "Create a Class" "Barracks" menu.

4) Go into "Barracks" with the second controller for the account you want to add tokens to.

5) Go to "Prestige Shop."

6) Once in "Prestige Shop" push B. The prestige box should have your cursur in it now, with the emblems for YOUR account. Select enter prestige.

7) Success! You should now have one more prestige token.

You may repeat this step as many times as you wish, to either get yourself out of negative tokens, add more tokens, or both.

Hope this helps!
Happy gaming!