For a long time when looking for work I got absolutely no callbacks. A friend looked at my Resume and said "You have this huge block of skills you say you have but you have no explanation for how you have them." I explained it was because I got most of my experience from working on OSS software or software for myself and if I listed everything my resume would be ~2 pages & ~4 sides. He said to go for it despite everyone else telling me at my age (18 at the time) my resume shouldn't be that long.
As soon as I listed everything I started getting calls back.