If you are a Kuwait citizen:

Official and ordinary passport holders of are exempted from visa for their travels up to 90 days within last 180 days.

If you are not a Kuwait citizen and you have residence permit in Kuwait:

-If you are eligible, you can apply to electronic visa through the website: www.evisa.gov.tr

-If you are not eligible for electronic visa, you need to apply for sticker visa through the website http://www.gatewayglobe.com/

You can check information about Turkish visa regime according to your nationality on https://www.mfa.gov.tr/visa-information-for-foreigners.en.mfa