For example, instead of saying, “I like to fish,” say, “All the time I've spent fishing has taught me that even the best line gets weak if you use it too often.” Instead of saying, “I'm an Information Technology Technician,” you might say, “I'm an IT guy, but I won't fix your computer until at least the third date.” Keep in mind that it's possible to be scrupulously honest and still funny.
Add a little humor to your description of yourself by tweaking any stereotypes that may apply to you.
Post a photo of yourself up on stage at the local comedy club, or perhaps, posed to resemble a Weird Al Yankovic album cover.
Wear a pair of oversized sunglasses or “draw” a moustache on your picture with a photo-editing program.
Again, change your photo frequently to keep things fresh.