1. Use a volumizing shampoo and conditioner: Look for products that are specifically formulated to add volume and thickness to hair. These products often contain ingredients like keratin, biotin, and collagen, which can help to strengthen hair and add body.
2. Blow dry your hair upside down: When blow drying your hair, flip your head upside down and use a round brush to lift the roots. This can help to create volume and lift at the roots.
3. Use a volumizing mousse or spray: Apply a volumizing mousse or spray to damp hair before blow drying to help add volume and hold.
4. Tease your hair: Use a teasing comb or brush to gently backcomb the hair at the crown of your head. This can help to create volume and height.
5. Try a volumizing hair cut: A layered haircut can help to add volume and texture to hair. Talk to your hairstylist about which cut would be best for your hair type and face shape.
6. Use dry shampoo: Apply dry shampoo to the roots of your hair to help absorb excess oil and add volume. This can be especially helpful for second-day hair.
7. Consider using hair extensions: If you want to add extra volume to your hair, consider using clip-in hair extensions. These can be clipped in near the roots to add volume and thickness.

Remember that everyone’s hair is different, so some of these tips may work better for you than others. Experiment with different products and techniques to find what works best for your hair type and style.