There are really only a very few rules for great hanging bakets, but you do need to follow them for the best results. I have found:
1) Use as many plants as you can stuff in them, and then a few more. Ensure you do get good trailing plants with a good central unpright one. I use around 20 plants for a 16 inch basket. Buy 'em small and let them fight over root space, they will manage, they're only going to be there for a season.
2) Plant them up and keep them indoors until they are growing well - I have a small cool greenhouse and hang the baskets from the roof for about 6 weeks before they go out. I have a friend who hangs them in her bathroom ......... old house, wooden beams.
3) Feed and water far more than you imagine needful. Use some loam compost and vermicuite in the mixture to give the basket weight and ability to hold on to the water.
4) Deadhead, daily, twice a day in high summer (if we get one).
5) If it rains, take them down and put them out in the rain, they will do better for that than any watering you can do. If it is very windy, take them down anyway or they will end up ratty looking, it rarely lasts so long here.
6) Enjoy them, they can be stunning if well done.