Diversifying your money is a good option, as it reduces the risk. So apart from mutual funds:
You can invest in Nippon India ETF Nifty BeES or ICICI Prudential Nifty Next 50 ETF. Sovereign Gold Bonds are again a good option. PPF or NPS are also long-term, tax-efficient saving options. Consider investing in real estate through REITs or InvITs.