The Phuket Action Plan calls for a worldwide ad campaign to calm tourist concerns over the affected areas, along with airline ticket and holiday promotions, sponsored roadshows and a campaign for more 'responsible' travel advisories.
In addition, the plan aims to improve communications on the ground and provide technical and financial assistance for SMEs and training for new employees to replace those affected by the disaster.
A new WTO coordination group will meet in March to follow up on the proposals.
So far, South Korea has pledged US$400,000 to the plan, while the Netherlands, Visa International and the UN Development Programme have pledged unspecified amounts.
The plan comes as new findings from Hill & Knowlton reveal that Fortune 500 companies together rank as one of the top 10 donors to the crisis.
According to the research, contributions from the Fortune 500, exceeded $250 million, led by Fortune 100 companies that provided nearly 75 per cent of this total.
"Corporate America is no longer just paying lip service to its global citizenship role," said Michele Quintaglie, senior vice-president at Hill & Knowlton. "Together, these companies have pledged more than most individual governments, and that makes them a powerful entity in the area of aid and development."
Meanwhile, major airlines are leading a 'Bounce Back Sri Lanka' campaign, to kick-start tourism in the strife-torn country. Sri Lankan Airlines, Singapore Airlines and Emirates are all offering special deals, while musicians and supermodels are expected to visit the country in the coming months.