An implantable progesterone-only birth control method would be the best choice for this patient. Since she is a smoker, a progesterone-only method is preferred to lower thromboembolic risk. Since she has a difficult time remembering to take daily medications, an implantable method is better than a daily pill where she would be more likely to miss doses. An estrogen-containing method is not recommended because she is a smoker, which would increase her risk for clots. While condoms are a method to prevent the spread of STIs and their regular use should be encouraged, their failure rate as a birth control method is much higher than hormonal therapy.