Consultancy is a popular, and (financially) rewarding, career choice. Consequently, it's a hard game to get in to. Fortunately I can now reveal that there are just three attributes you need to possess to be a successful consultant.
Consultancy firms are looking for confidence above all else from their employees. This is because the function of a consultant is to ask the client what they suspect may be true about their business, then repeat it back to them with such conviction that they become convinced that it is indeed true.
Consultancy is a cut-throat business, and a consultant's charges are his chief competitive weapon. This is because the level of your fees tells your client how good a job you have done. The most successful consultancies these days demand payments of slaves, exotic spices and small- to medium-sized banana republics.
Businesses employ consultants because they are experts in their field. Memorising this diagram should help.