Which typestyles can be used together?

When pairing typestyles, it's effective to combine a serif font with a sans-serif font for contrast and readability. For example, a classic serif font like Times New Roman can be paired with a clean sans-serif like Arial. Additionally, using a bold font for headings alongside a lighter weight of the same typeface can create a cohesive look. Always ensure there is a visual hierarchy and that the styles complement each other without clashing.