Talk about it as something somewhat intentional, by attempting to make it progressive. Cite what you learned from and contributed to each job/company, and how that has shaped you and makes you a good candidate. As you summarize, state your experiences have contributed to your current desire for a long term commitment. Then keep that promise, no matter what, for a minimum of 2 years, and don't leave the job until you have another job. If you have to take a less than ideal job to accomplish this, that's okay, because it is an investment in you, your future.