Do a little research on the company you are applying to: What they manfacture or what service they provide. How long they have been in business and any challenges they are facing or will face in the near future. When citing your hobbies, interests and life experiences try to show how they, or the lessons you learned from doing them, can benefit the company. Show a lot of enthusiasm, but dont over do it. Eye contact is very important during an interview. When the interview is over, stand up and sincerely thank the interviewer for their time and while looking them directly in the eye, and giving them a firm handshake reaffirm that you know you will (not would) be a valuable asset to the company. Two things I always did was 1) go into the interview with the confidence I already had the job and was deciding if I wanted to take it. 2) Immediately after the interview, in a notebook that you already have in your car,take notes on: What did I do right? And, What did I do wrong? Good luck!
Yes it should help.... To be honest, to get yourself a foot into the door especially if you lack work experience, it come down to who you know rather then what you can do. Many jobs in large corporations are taken up by people who happens knows someone internally. You could compete with 50 job candidates from scratch, but if you know someone personally in the company and the person is fairly high up in the organisation, you will be guaranteed a job offer or a face to face interview at least....Whether one can hold down the job is another issue. :-)
At 28...you should have already had an internship (or two)...and unless you spent a lot of time repeating grades or getting multiple undergrad degrees, you should have an advanced degree by then - which always means thesis, advanced research, etc. So list those things :) Also solicit your professors for recommendations, as usually at that stage in school, they will carry much more weight than undergrad professors from a four year degree (imho).
List your hobbies, things you are good at and your attributes (eg. working well within a team evironment, reliable, quick learner etc) on your resume if you lack actual work experience.
You have got some points here as these things will fill up little weight age onto your resume right?