"To get creative" means to think outside of the box, come up with new ideas or solutions, and use your imagination to approach a problem or task in a different and inventive way. Full definition
Many of my test parents report success when getting creative with the presentation or the names of the foods they want their kids to eat. (diaperpincorner.com)
Music plays a large role in getting my creative juices going. (bookgoodies.com)
Everything works well and you can really get creative in how you choose to sneak about or lay waste to everyone in your path. (metacritic.com)