Would a gardener give me some advice, please?

I have some space next to my driveway, half next to a house, so quite shady, and the other half is next to a fence, and it gets partial sun. Right now, this bit of earth is full of gravel, weeds and struggling gr. What I'd like to do is take the entire warm season (which is quite short in my zone) to amend the soil for next year's use. I'm going to rent a rototiller and work the soil, removing as much that's growing, and the rocks, as possible. Next, I plan on mixing in fresh top soil, aged manure and compost. I'll be planting hosta bulbs, in the fall (and mulching the entire area) next to the house and fence with tulip and other such bulbs in front of the hosta and then in front of those, flowering annuals and herbs in the Spring. My question is...How do I stop the weeds and gr from coming back, or do I just have to keep pulling them? I won't use poisons...organic only. Also, does my plan sound correct, or am I missing a step? Any other ideas you might add? Also, feel free to suggest good gardening and landscaping sites.