I tend to use one of my bins as a collecting bin and throw into it everything I am going to compost, not bothering at this stage about greens and browns. When this bin is full to overflowing I then turn it into one of my other bins adding browns ,a sprinkling of rabbit poos, coffee grounds ( not sure if they make any difference, but they smell nice) and any water if the material is a bit dry. The bin is then sealed up and left to 'cook' until the bin is needed again, usually 6 to 9 months.
The resaulting compost may not be perfect, but it's good enough for using on the plot.