With the names, try thinking about what culture your characters might come from. What would your character's parents be likely to name them? (A Japanese gardener might name their daughter Sakura, for instance.) If you're writing a fantasy, think about what culture you might try to mimic. Looking at baby name sites, like phantomkitsune suggested, can help a lot.
As with actual character development, start with their goal and motivation. These can change over the course of the story but make them solid. Then add on some values, background, and personality. Ask a lot of questions. Where do they come from? What are their mannerisms like? What are some quirks that may come up in the story? What are some traits that may hinder them during the plot? Then figure out some obstacles to their goals. Are there antagonists? Do they struggle with some internal conflict? Where does the setting take place and how might the features help or hinder them?
The stickies have a lot of information. You can also try looking at author blogs or pick up a book about writing fiction at a local bookstore. If you run into any specific problems, don't be afraid to ask for help here.