Simple look box packaging design for dog's sniffing carpet.
Start with read the brief and try to communicate with client. Write the keywords and try to use them effectively.
Make some rough sketch, such as a composition, what kind of image that fit on the design, etc.
After that, try to digitize the rough sketch. I use Adobe Illustrator and Adobe Photoshop to do that step.
If I think the design is good enough, I put the design on mockup, so the client could imagine the final.
Last but not least, offer the design to client and describe the design. Waiting client's respon :)