Some TSLint rules that I like

tslint.json

{
  "rulesDirectory": [
    "tslint-no-focused-test"
  ],
  "rules": {
    "array-type": [true, "array"],
    "arrow-return-shorthand": [true, "multiline"],
    "class-name": true,
    "comment-format": [true, "check-space"],
    "indent": [true, "spaces"],
    "no-consecutive-blank-lines": true,
    "no-debugger": true,
    "no-duplicate-variable": true,
    "no-eval": true,
    "no-focused-test": true,
    "no-internal-module": true,
    "no-return-await": true,
    "no-string-throw": true,
    "no-switch-case-fall-through": true,
    "no-trailing-whitespace": true,
    "no-var-keyword": true,
    "object-literal-key-quotes": [true, "as-needed"],
    "one-line": [true, "check-open-brace", "check-whitespace"],
    "quotemark": [true, "single"],
    "semicolon": [true, "always"],
    "space-before-function-paren": false,
    "ordered-imports": true,
    "triple-equals": [true, "allow-null-check"],
    "typedef-whitespace": [
      true,
      {
        "call-signature": "nospace",
        "index-signature": "nospace",
        "parameter": "nospace",
        "property-declaration": "nospace",
        "variable-declaration": "nospace"
      }
    ],
    "variable-name": [true, "ban-keywords"],
    "whitespace": [
      true,
      "check-branch",
      "check-decl",
      "check-operator",
      "check-separator",
      "check-type"
    ]
  }
}