Some things to keep in mind when writing your résumé
Tailored and concise - If you are not there in person, it means your résumé has to do your talking for you. Remember, it's not a full technical manual - it's a sales tool. So if that means rewriting your résumé for different job applications, do it. The reader needs to recognise immediately what you have to offer and how you are going to make a real and positive impact on their business. Your résumé needs to be clear and simple to understand. In particular, these are the points to focus on:
Responsibilities vs achievements - Potential employers generally understand what you are / were employed to do. However, it’s also important to show what have you achieved in the role. Your potential employer needs to be convinced that you're going to add real value to their business.
Style and format - First impressions are paramount. Rightly or wrongly, the reader can be adversely affected if the résumé isn't both clear to read and appealing to look at. Don't try and be clever - choose a simple typeface and size and keep it constant throughout. By all means, highlight key headings, but don't overdo it.
Content - Apply the 'so what?' rule to everything you include, and consider the relevance of all the points you're listing.