If you want a "clean edit" first, Stephanie showed how to do one in PicMonkey here.
PicMonkey. Then click on the beaker symbol on the left (circled in red).
Now it's time to have some fun! There are some great actions to use and all of them are customizable or you can cancel the action if you decide you don't like it.
Here are some of my favorites:
"Cross Process" at 50% fade on green.
"Tranquil" at 0% fade then "Dusk" at 50% fade.
"Polaroid Film" at 65% fade then "Boost" at 20% strength.
"Focal Zoom" with circle around his face then "Time Machine" Norma at 35% fade.
"Black and White" at 0% fade , "Boost" at 50% strength and then "Urbane" at 50% fade.
It's really easy to play around with each effect and come up with a totally unique and fun picture. Make sure to hit "apply" after each edit if you like it then when you are completely done to hit "save" above your picture.
And just for fun, I used their Halloween edits to make Hudson into a zombie and me into a vampire!