I hire a pro. Seriously. You want something crocheted - I am your gal. You want graphics to look fantabulous - I am NOT your girl!
This is who does my banner, promo material graphics, etc. She is great and sends me complete files so I can then use them for business cards, promo cards, whatever I need.
http://www.etsy.com/shop/WinchesterLambourneand this is the shop who is also wonderful who helped with my previous banners and helped me design my logo
www.morbidmaterials.etsy.com
Here is the thing - some people will say, why spend money to do what I can do myself? I just need to learn how or get better at it.
To me, that school of thought is very good for some things, but not good for all. I think I can spend 6 hours maybe reading, trying and learning how to do a graphic and then IF it comes out right work on sizing for various applications and such. Well, how much is that time worth! I can make a LOT of hats in 6 hours!
So it is cost effective in the big picture to get someone who can do that for me and I can use that time working on what I do best.
Both shops I mention I had excellent experience with and found right here on etsy!
Good luck!!!!