Random Band Press Kit Tips from industry experts:

• If you're doing press on your own band, the big mistake I've seen is putting too much stuff in the presskit. Don't include the calendar listing from the Village Voice the one time you played CBGB's. Every band has played CBGB's. It's not a big deal.
• If you do have a bunch of good reviews, excerpt the best lines so you can fit five reviews onto one page. Unless it's a rave review in a substantial magazine, just do a quote sheet for the bulk of them.
• Also, you should assume that all music writers and industry people are irritable, overworked, stuck up, lazy, and uninterested in doing the work it takes to discover good new music. Make it easy for them. Don't give them too much information.
• Perhaps the key component in establishing a professional image is what materials are used in the packaging. Be realistic about what you can afford but remember that in the music industry the first impression can mean life or death.
• Likewise a good publicity photo will get a lot of mileage. And similar to the logo it pays to research publicity photographs of other musicians
• It's important to portray your selves as a professional artist, moving
  up, making strides, and developing your fan base. Industry types that
  receive press kits on a regular basis are looking for substantial,
  legitimate press and promotional materials,. Materials that reflect your
  band's progress. NOT FLUFF! Fluff only serves to show that you don't
  have genuine credentials. THIS DOES NOT WORK! Industry people know in an instant what credible press is and can spot fluff a mile away.
• Quote sheets can be a useful addition to a demo/promo/press kit. It is simply a document that lists positive comments about you or your music, made by various professionals.
• The goal of the press kit is twofold: The factual information within is sufficient for journalists to base an article or review upon, while the editorial content of the artist's biography leaves enough room for a certain element of hype--above all else, the end result of the press kit is to generate interest for the artist. The press kit serves as the "mouthpiece," the salesman pitching the performer du jour