Start with a professional resume, it might even be worth it to seek a professional who can show you how to format it better and maximize your experiences and show your skill set. You don't have any information on your profile so I don't see your experience. Get some letters of reference, these should be persons who have first hand knowledge of your skills. Dress for the job you want. That power suit goes a long way. Finally you have to talk the talk AND walk the walk, if you are not confident it will show. Be knowledgeable in your field, you must be able to articulate how you would be an asset and give examples of how you were an asset in your previous positions. No one knows your age and they can't outright ask you so let your accomplishments and your confidence convince them. Good luck