Stone magic: chrysocolla, citrine, emerald, labradorite, lodestone, malachite, ruby. Of those, chrysocolla is also a healing stone that's good for replenishing energy.
Here's a spell for sleep. This one uses smokey quartz, which is a favorite of mine for sleep magic. Get a "generator" crystal if you can find one: a short, fat crystal with the base cut smooth so it stands point-up. Keep that by your bed.
Aromatherapy like room scents (lavender is great for this, if you like it) and dream pillows can not only bring sleep but fine-tune the kind you want. Of the recommended stuffing herbs, hops, chamomile, and catnip have the strongest sedative effects. But don't underestimate the power of just having something soft to snuggle. You may also wish to ask the plant spirits to strengthen these effects.
You can also appeal to deities or other sleep figures. Good old Morpheus is an excellent bet if you don't need anything fancy, just help falling asleep. Some people like the Sandman.
Moving along to mind magic and energy work ...
Meditation is terrific for falling asleep. *chuckle* In fact it can be like trying to hit the ground and missing: folks who are attempting to meditate often wind up asleep instead.
Yoga has a whole branch for sleep, yoga nidra. The ultimate goal is lucid sleep, but of course, to get that far requires being able to get a good, deep sleep. So the lower level stuff is all about how to fall asleep and get restful sleep.
Two exercises are terrific for falling asleep: progressive relaxation and chakra work.
Progressive relaxation text:
OM is another terrific sleep aid. You need a good one. I have, on occasion, seen groups do truly amazing things with this. It's one of those do-it-yourself brain repair tools, although it takes time to work. Done well, it puts you in tune with the vibration of the universe. Done poorly, it can bore people to sleep, which is fine if the goal is sleep rather than meditation. But a good OM is much nicer to hear than a crummy one.
Hypnosis is awesome for sleep. It can be pretty similar to the guided meditations. It's easier for most people to have someone else put them into trance. Other folks do better on their own. This is another one where people may start with another intent and then fall asleep.
You can also try just talking to your body and asking it to do what you want. This works quite well for some people. Certain traditions say there is a "body elemental" which maintains your physical form and its functions, so the idea is to reach that entity and convince it to do something more constructive that whatever it's annoying you with. In this regard it may be helpful to have a road map. Look at the brain waves and the states they produce. Active mode is beta. Relaxation is alpha. Deepening sleep levels come with theta and delta. (Gamma is a high note hit by some transcendental meditation and REM sleep.) You want to hike down from beta through alpha into theta and delta.