1. Use Bitcoin ATMs. Fees could be high compared to using an exchange though.
2. Trade with individuals in P2P platforms such as Paxful, Localbitcoins using PayPal, Skrill etc. (beware of chargebacks) or face-to-face.
3. If you're European, try to use Bitstamp, Bitfinex, Coinbase, Coinmama, BitPanda etc.