Ummm, I compost everything green - veg and fruit waste, insides of toilet rolls, the odd bit of newspaper, soft clippings from the garden. We have just opened last year's bin and the soil is lovely. Don't put in eggshells, they never break down - don't put in any protein, so no meat or fish leftovers. Dont put twigs, they will still be there next year. Put it on soil, so the worms can get in, and it gets quite hot in there - sometimes I've opened the bin and loads of little red worms are resting in the lid - just leave them there. It's a great way to recycle, and you will feel very virtuous when you don't need to buy compost next year. BTW we have two bins - one being filled up, and one being turned into compost. When bin 1 is full, we shut the lid and tip the compost in bin 2 into sacks (or a dustbin) until we need it, then start filling up bin 2 again - don't look at bin 2 for another year, except for giving it the occasional watering if the weather is very hot.