At Above the Law, Grover Cleveland gives some advice to third year law students looking to be better prepared to practice when they graduate.
 
Cleveland also points out that law schools are not doing a good job preparing students to practice law:

In the Above the Law/Swimming Lessons for Baby Sharks Millennial Lawyer Survey last year, 71% of the new lawyers who responded disagreed with the statement: “Law school prepared me to practice law.” And the new lawyers were more optimistic than those who train them at law firms. When our survey asked Professional Development professionals, “Law school prepared associate to practice law,” 87% disagreed.
 
Some of the key skills and attributes that law firms often say are “missing” from law school include: Skills related to networking and business development, client service, industry knowledge, and business skills, such as finance and basic accounting. Many new graduates also find that they need to work on skills such as staying organized and managing time.