What steps can be taken to make my new sleep set last longer?

Firstly, you can ensure that the foundation or box spring is well supportive, thus preventing deformity of the mattress. You can also use a mattress protector to protect the mattress from dust, stains, allergens, and mites, and also keep it dry. Additionally, you could also vacuum the mattress to remove any embedded dust and unwanted particles. Rotating and flipping your mattress from time to time also helps relieve sagging and shifting of inside contents.