The fastest way to get bitcoins is to find a Bitcoin Exchange or a Bitcoin ATM. Just take a look at the links bellow:
PAYBIS.COM: The easiest way you can buy bitcoins directly with your debit or credit card. A detailed video is available here
BUYBITCOINWORLDWIDE.COM:An extremely convenient website that will help you to locate a reliable bitcoin exchange that supports your favorite payment method.
COINATMRADAR.COM: All you need to know about bitcoin ATM. Detailed ATM map. Browse ATM by countries. They have a mobile App too. Android or iOS
Important: Frequently, Bitcoin ATM fees and buying exchange rate are highest on the market! Please always double check the amount of bitcoins you will receive for your fiat money and compare it with an official and actual rate exchange like Preev.com.If the amount of coins is significantly lower than the expected one please do not proceed with payment and try a different method of buying Bitcoin.
Exchanges where you can purchase bitcoins via cash deposit:WallofCoins, LocalBitcoins, LibertyX, BitQuick,
Exchanges where you can purchase bitcoins via credit/debit card: PAYBIS.COM, Binance, CoinMama, BitPanda, Bitit, Cex.io, BitStamp
Exchanges where you can purchase bitcoins via bank transfer: Gemini, Xapo, BitStamp, Kraken, BitPanda
Below is a video tutorial prepared by LocalBitcoins.com. Other exchanges will provide you a similar experience, meanwhile at LocalBitcoins you can buy bitcoins with cash, bank transfers, PayPal and other various payment methods.