Edit: Sometimes you don't have a chance to adjust your white balance before taking a photo OR... someone else has your camera and they don't quit know how to change the settings for you. :) So, this is what this edit is for: removing the yellow.
I do more edits than just what I'm showing above. BUT, I just wanted to give you a quick idea of how to remove a ton of yellow in your photos.
In Photoshop the Selective Color layer is one way to do this. You can pull that up and adjust the reds and yellows to your liking. AND, if you want to go just a little further... you can play around with the Color Balance layer. Sometimes adding a little blue highlights will help lower the intensity of the yellow room.
Link up your Touch Ups below! Linky's always close at 11:59 PM Wednesday evenings (Pacific time).