How did roosevelt's background prepare him for the difficulties of the depression years?

A privileged life didn't hurt. Neither did having a famous cousin who was President (Theodore Roosevelt). 

Franklin was an only child. His relationship with his parents, especially his mother, was very strong. It was her unshakable faith in him that many believe gave him the self-confidence that enabled him to succeed later in life. 

French and German governesses educated Roosevelt until he was fourteen, and he spent most of his free time riding on the estate and playing by himself. He accompanied his parents on their travels to Europe and to all their social engagements. This youth spent in the company of adults helped him develop a charm that would prove indispensable later in life, but left him ill used to being around children his own age. This proved to be a drawback when his parents sent him away to the Groton School, a recently opened school that had the backing of many of the leading men in America, such as J.P. Morgan. Roosevelt's experience at Groton was a personal disappointment because of his inability to win over his peers as he had won over his parents and their associates. It may have been the bitter memories of his years at Groton that made FDR determined to become a leader at Harvard, which he entered at the turn of the century. Unlike many of his fellow classmates, who were used to living the life of the idle rich, FDR set the pace with his enthusiasm and energy. He studied subjects that would be of great use to him in his political career–history, government, economics, English and public speaking. He lived in one of the three-room apartments on Mt. Auburn St., nicknamed the "Gold Coast" because of the wealth of the residents. He sat at the Groton table at one of the eating houses of Cambridge and joined the Fly Club, one of Harvard's many exclusive organizations, when he was passed over by the more exclusive Porcellian Club. FDR cut quite a figure in Boston society, and was especially popular with the women. He was elected editor-in-chief of the Crimson, partly because of his enthusiasm and partly because his connections to the White House through the Roosevelt family allowed him access to stories other students could not get.

The Nile River is the longest river on Earth. The river begins in central Africa and flows over 4,000 miles north to the Mediterranean Sea.