I use the CP-E4 battery-pack with the 580EX and love it.
The recycling times are great, it’s also extremely compact and either can be attached to your belt or put into your front trouser pocket. It is also much cheaper than any Quantum solution.
1) Don’t give your images away for free under any circumstance, even for accreditation.
2) Be very careful whom you send CDs of images to as they will use them again and again and try and not pay.
3) Use a site like http://www.photoshelter.com to make your images available to Clients, it will allow you to control and track their downloads.
4) Any Editors in the Press will have internet access and therefore sending them CDs is uneccessary and slow, use Photoshelter.
5) Just because you get your foot in the door, don’t expect to get the All-Ireland Football Final, there is only one a year, your bread and butter is made on the smaller games.
6) Buy rain gear for equipment, self (in that order).
7) Buy the fastest lens you can afford.
8) Be very critical of your own work and don’t be afraid to crop, crop, crop (within reason).
9) Don’t send newspapers full resolution images, they don’t need them, 2000 x 2000 max pixels is fine. If they need more for a double page, they will ring.
I have had the 20D, 30D and 40D and never a days trouble with any of them. They are very well made and don’t give any trouble unless you expect it to perform outside of it’s parameters i.e. 300K Shutter Actuations, Sahara sand, Treating it roughly etc.