The easiest way to improve your overall internet security is to use better passwords. I hope you're not using one of the top 5 most common ones:
- password
- 123456
- 12345678
- qwerty
- abc123
The best solution is to use a password manager like one of these (both are cross platform:)
If you prefer to manage your passwords manually, here are some tips for creating better passwords:
Courtesy of Lifehacker