Too many times pictures of folks on their Facebook, Twitter and LinkedIn profiles do not look like them. Your photo needs to be a professional one – not a glamour shot you cannot live up to.
For example, make sure the picture shows you wearing your hair as you usually do. For women, if you typically don’t wear make-up, be sure the photo gives the appearance of natural makeup—not too heavy.
The only item you can fudge is glasses. You don’t need to have a photo with them on if you only wear them occasionally. But I do recommend you eventually have photos taken with glasses if you wear them all the time.
Overall, make sure your online profile picture looks like you.