Don't create bonds at character creation
I know the book tells you to do it when you first roll characters, but it feels forced and players are almost always going to use one of the 4 suggested ones and shoe-horn one of the other PCs into it. This leads to a very artificial backstory that's not really fleshed out and the onus is on the PCs now to try to resolve something they can't even explain to both remove the bond and get the XP bonus for doing so.
Bonds should be created as a result of play
Part of the end of session move is resolving and creating new bonds. That's why I simply don't have characters create any bonds for session 1. Maybe the character took more than his fair share of the loot, maybe he leaves someone to die, maybe he saves all the PCs, anything could happen and will tie in better with your story than creating bonds beforehand.
Introduce the character in a situation likely to cause bonds to be formed
That said you as the GM can always engineer the introduction of a character to increase the likelihood of other characters forming bonds. Maybe he's the drunk who started the tavern fight that got the PCs thrown in jail. Maybe he's the traveler that warns the party of impending danger. Whatever you do, be sure to make the introduction of a new character dramatic and relevant. An excellent time to do this is during a carouse.