1. FEED: Roses love Epsom salt. The magnesium helps them stay green and increases the number of bloom by causing basal breaks. It also seems to make the bush resistant to insects when sprinkled around the base. I also found that a 5-5-5 non-chemical fertilizer like fish or kelp provides the building blocks for growth and bloom. Alfalfa meal sprinkled at the base promotes and conditions the soil for plant growth and I have a vermicompost container (Blog) which adds nutrients and organic matter that improve soil.
3. OTHER CARE: Mid-spring is a good time to thin roses as you see new growth. Your bush will thrive if you remove thin shoots so the bush can expend energy growing and not supporting those shoots.
Deadheading should be done all the time. It encourages new growth.
I don't have to worry about winter cold but wouldn't advise doing any cutting in winter unless you have damaged canes. In really warm areas though, pruning when it's cool will enable the bush to store energy for the first bloom.
Hope this helps! Send your garden images and will post!