I've posted about this before, but the best, most hassle-free contraception I have used is the Fertility Awareness Method which involves charting your cycle on a daily basis by taking your temperature every morning and being aware of your cervical mucus. Tbh, like (I imagine) the majority of people, before I started I thought it would be a huge hassle, but was fed up of the pill (complete lack of libido);neither dh or I like condoms much; thought the diaphragm would take away any sponteneity and didn't like the thought of injections etc. I thought there had to be a good, viable alternative, and after a bit of research discovered this.
Anyway, I found it dead easy to follow the method (not to mention the fascination of knowing exactly what my body was doing at any point in time) and would now not use anything else (although will be forced to temporarily as am now breastfeeding - conceived really easily as I knew from this method exactly when I was ovulating).
I really feel quite evangelical about this and think it is a shame that it is perceived as being difficult or time-consuming when it is in fact neither of this things. It should also NOT be confused with the "rhythm" method which is notoriously ineffective.