Don’t select a picture which makes you look unprofessional (but do add a picture, since Profiles with pictures are far more successful)
Don’t write about anything you are not ready to discuss during the upcoming interviews
Be honest and candid: If you lie in your profile, it WILL come back to bite you!
Don’t undersell yourself: Understatements and omissions of important accomplishments will make your profile appear weak
Don’t ask for Recommendations from people you don’t know well: Any serious Recruiters WILL contact your Recommendations