A tricky one! Hormonal and barrier methods generally produce rubbish and many folk are not convinced by natural planning.
For a rather permanent solution, tubal ligation and vasectomies are rubbish free and some women may consider, and even prefer, the new generation of IUD’s.
Thanks to Liz from Upper Hutt for suggesting the Taking Charge of Your Fertility website and book for folk who want to find out more about natural planning. The site has an active forum for members and appears very supportive.