Last time I wore my hair in ringlets regularly the normal look for me was a front roll and brushed out curls, more 1940s style. Sometimes, if I couldn't be bothered to do anything else, I'd just take the rollers out and leave it in ringlets. At the time I usually slept in sponge rollers for a wet set, but I found them uncomfortable and I wouldn't be willing to sacrifice a good night's sleep for it these days!
About four years ago; sponge rollers and a wet overnight set with setting lotion.
I settled on satin rollers instead. They're a length of wire covered in sponge in the middle, then the whole lot is covered in satin. You roll the hair around the spongey middle part, then bend the wire ends over to hold in place.
You can get a pack of 12 on Amazon for just under £6 with shipping.
After showering I just wait until my hair is almost dry, then put them in and leave overnight. (I bought two packs but have only been using one.) They're incredibly comfortable to sleep in, so that you only notice them when you roll over - I certainly haven't lost any sleep over them. In the morning take them out carefully and voila, perfect curls! I've not been using setting lotion or hairspray, so they drop throughout the day and become looser and more natural looking - but the curl still stays in all the next day too.
Today, after a morning of housework and a trip out in the wind to the doctors - not bad!