Easiest overview of hacking and its methodologies

• A hacker is someone who seeks and exploits weaknesses in a system or computer and this process called hacking.
  
• Gmail, Yahoo, Facebook, Web services or any other strong security logging system not hack-able directly, indirectly we can use methods-
• Using Phishing 
• Using Key logging Software
• Using browser leaks (like Using Password Reminder Script)
• Using forget option (Should be strong guesses)
• Many available tools 
• Much technical knowledge, can do more
  
• For weak logging system we can use also
• SQL-injection
  
• Many available tools are (helpful to hack)-
• Nmap for port scanning
• w3af - Open Source Web Application Security Scanner
• Aircrack-ng is an 802.11 WEP and WPA-PSK keys cracking program
• Bluffmycall.com: for call spoofing
  
• There is a very good resource website to learn hacking:  https://www.isoeh.com
  
• Call spoofing, SMS spoofing, email spoofing very good way to take help to hack