I think Daniel's advice is very good, but you should consider weaning to a sippy cup instead of a bottle. I started my dd on a sippy at 6 months for juice and water. Also, start with a mid-day feeding, or middle of the night feeding if she still wakes. Are you really sure you want to wean? It is so good for mother and child to breast feed for the first year. I know it can be a bit limiting to your schedule, but you only have another 6 months to go. With both of my children I would nurse in my car if I was out with them.
There are a few natural times for a child to want to wean themselves. Which my be easier on her, I think that one is actual around 6 months. My dd deceided she didn't want to nurse anymore around 11 months, she just had better things to do, which made it easy on both of us ;0)
I am currently nursing a 6 month old boy and nursed my 3 year old for her 11 months. I still hold those moments close to my heart. I can still remember all that time that we shared, the breast is just so much more personal than the bottle. I know it isn't for everyone, just make sure that the choice is right for both of you... good luck.
Kami