Don't forget to warm the jars before you pour the curd in. Otherwise they'll crack.
Put them into a warm oven or turn them upside down and pour plently of boiling water over them.
The curd will keep for several months unopened in a dark cupboard - don't forget to label them so you know what's in the jar and when they were made.
Once opened, then keep in the fridge for few days to a week.