By simply keeping your own waste (human trash) to keep it inside your bag when your traveling, for example, candy wrapper, bottled water, personal hygiene materials such as tissue. Then, throw it in the right trash bin or bag once it is available. Otherwise, just keep and released them once your home. 

For an organization or company, each of them has a corporate responsibility initiative then they bring this to the community.  Like SM Supermalls.  They have SM Cares.

Last weekend, different organization and volunteers went to SM by the BAY and participate to a quarterly cleanup drive

This aims to mobilize and educate the public on the importance of protecting waterways such as beaches, rivers, and the bay, to keep them free from litter and commercial trash, SM by the Bay's regular cleanup drives support the Manila Bay Rehabilitation Program and has been in place since 2015. This initiative forms part of SM's commitment to the government, which will be followed by a cleanup of the portion of Paranaque waterways.

Representatives from Pasay City - City Environment Office (CENTRO), Non-government organizations, employees from the US Embassy, local community, and employee volunteers from SM are expected to participate in the quarterly cleanup activity.