I used to suck so bad at resumes. It used to cause a lot of anxiety for me to write them. A couple years back I took a college course and part of it was on writing resumes. It really helped me A LOT! One of the key things is to plagiarize what they are asking for in the ad. On the resume, you put 5 to 7 key skills at the top and then under that you elaborate on them. Always word them as accomplishments, for example, word it like "designed and installed computer networks", not "have computer network design and installation skills". Also, I like to keep things short, neat and easy to read. Write it so that an employer will get a good idea of what you are capable of just skimming over it. Also, for the "objective" in the resume, be sure to personalize it to the company. This is just an example, but instead of putting "custodial engineer", put "custodial engineer for jim's custodial services, inc.".
The last resumes I sent out, I had a 3 paragraph cover letter that detailed my interest in the position, the training that I took, and the duties of my current day to day position. This seemed to work very well, and got me 2 interviews out of 4 resumes. I was offered a position but didn't take it, because I was offered a pretty killer raise to stay at my current job. Even the losers get lucky sometimes!
Interviews also were a big cause of anxiety for me (socially retarded), and still are to some extent, but practice makes perfect. I've gone to interviews for jobs I knew I didn't want just for practice. If I concentrate on how much I want or need the job, it kills me every time. I try to get in the mindset that I am just hanging out with this interviewer for a bit and shooting the breeze about the type of work that I do. If I bomb, or don't get the job, I don't beat myself up. I take a casual approach; maybe try to crack a joke to break the ice. If the employer is too serious or formal, I take that as a sign that they would not be a good match for me.
I'm no resume expert, but I could send you a sample resume if you'd like.