@laurl17 As the question is not specific I will list a few things that increase your online privacy.
Use a browser that doesn't spy on you which is what "duck duck go" claim, use a VPN and/or a TOR browser. Use email provider based in a country where privacy is bound to be honoured by law e.g. Switzerland. Always use encryption for communication always!!! This might not guarantee your security but it means anyone trying to snoop into your affairs will have to work damn hard and it will cost plenty time and money.