I found a Photoshop portrait tutorial written by Kirk Nelson on How To Make Someone look older in Adobe Photoshop and the link to the tutorial is posted here http://design.tutsplus.com/tutorials/how-to-make-someone-look-older-in-adobe-photoshop--cms-25973 

the tutorial was overall very clear as to the instructions but they didn't come across enough for me to fully understand how to do a handful of the key steps. along with these instructions was informational texts as well as pictures but some of the pictures didn't match with what the text was saying and it often caused confusion. despite some confusing elements in this tutorial i tried to continue it anyway and got a handful of the main aspects of the tutorial. some precautions id give you are that if you don't have and image of an older person that looks like it would fit you this will be tough  and sometimes the directions can be confusing. the projects level of how hard this is id say its intermediate to some and easy to others. i learned some interesting new things about being old and some new photoshop tricks on how to create a certain effect in this case being turning myself older. i tried to follow the directions as best as i could but at times it got confusing so i had to figure it out overall id say this is a cool tutorial but may be confusing to some.