Hi Arsha,

Very interesting question really and here is what I think about the differences.

To describe recruitment, I would use help from Edwin Flippo and according to him - "Recruitment is the process of searching for prospective employees and stimulating and encouraging them to apply for jobs in an organisation".
Recruitment enables the organisation to select suitable employees for different jobs. it is the most important function of the personnel department.
It is concerned with the discovery of the sources of manpower and tapping of these sources so that the potential employees are properly evaluated and the new employees are placed and inducted to fill up the vacant position in the organisation.
Recruitment aims at developing and maintaining adequate supply of labour force according to the need of the organisation.

Staffing on the other hand involves finding the right people, with the right skills, abilities, and fit, who may be hired or already working for the organization or may be working for competing companies.

Staffing can also refer to the industry and/or type of company that provides the functions described in the previous definition for a price. A staffing company may offer a variety of services, including temporary help, permanent placement, temporary-to-permanent placement, long-term and contract help, managed services, training, human resources consulting, and PEO arrangements, in which a staffing firm assumes responsibility for payroll benefits, and other human resource functions.

Cosulting however is the business of providing advice to clients for a fee in order to help them solve a particular problem or range of problems within a certain area of business. Consulting services are provided by consultants, a majority of whom have gained their expertise from previous employment.

I hope this helps.....