You don't need to be creative to get quads, you need grit.
Unlike many other muscle groups, the quadriceps don't require a lot of creative programming, they do however require grit. The only way to build bigger quads - and legs to that point - is to grind through performing heavy weights at a full range of motion - repeatedly and consistently.
Adding some variety in the types of movements you perform, such as focusing on squat depth or performing single-limb exercise, can also force the quads to work harder and cause higher levels of activation. The below program provides a well-rounded hypertrophy program that will help you achieve more defined quads. The program also involves the use of SAGA's Blood Flow Restriction Cuffs during accessory strength exercises.
Blood Flow Restriction is a highly-researched training methodology that is known to help individuals accelerate muscle gain due to it's ability to activate high levels of metabolic accumulate in the muscle - one of the three primary mechanisms for muscle hypertrophy.
Bodybuilders have used BFR for years, yet this was often done using a torniquet or rope to rape around the muscle - which isn't always the safest or most effective method to practice BFR, as it requires a lot of guess work and often results in people not wrapping the cuff tight enough to truly benefit. The BFR Cuffs by SAGA are the first cuffs to truly harness technology that will help people safely and effectively practice BFR.
Click here, to learn more about the history of BFR.