There exists an unlimited variety and number of resources available to inspire your creativity and ideas.
Resources can take the form of other people; travel; art, dance, music or other classes; going to see a play; yoga and meditation; your own memories, dreams, and experiences and those of others; great works of literature; social, economic, and political debates; books written on the history of different countries, companies, leaders, and organizations.; and any topics, experiences, or people that cause a spark, positive or negative, in you.
Whatever resources you choose, the key is to try many new experiences, to challenge and expand yourself.