The usual COLD conditioning. While gelatin works well and speeds the process, I have found that time and cold temps will clear most beers pretty darn well. Gelatin will speed the process if your in a hurry.
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If you have room, put your secondary in your frig or keezer now to cold crash. The beer will be clearer before you rack it into the keg. Then sitting in the cold inside the keg will clear it that much more.