Nuts are being reported to aid weight loss and improve insulin response, assuming that they are raw and not covered in bad seed oils.
They can at times taste stale directly from the packet. I find that roasting them in the oven improves their taste immeasurably. Experiment with your oven on roasting times, and use a timer, as they can very easily burn.
Try Almonds, Hazelnuts, Brazil Nuts, pumpkin seeds, sunflower seeds. Soak in water overnight, drain and roast for approx 40 minutes at 160 deg C. Add some salt if you like when they are hot to make them a great snacking substitute for crisps.