My preferred settings for JSHint

.jshintrc.js

{
    // Enforcing options
    "bitwise"       : true,         // Warn when using bitwise operators, most of the time it is a typo
    "camelcase"     : true,         // Force all variable names to use either camelCase style or UPPER_CASE with underscores.
    "curly"         : true,         // Always put curly braces around blocks in loops and conditionals
    "eqeqeq"        : true,         // Always compare using === and !==
    "forin"         : true,         // Force the use of hasOwnProperty() checks when iterating object properties
    "freeze"        : true,         // Prohibit overwriting prototypes of native objects like Array
    "immed"         : true,         // Prohibits the use of immediate function invocations without wrapping them in parentheses
    "indent"        : 4,            // Tab width for the code
    "latedef"       : true,         // Prohibit the use of a variable before it was defined
    "newcap"        : true,         // Force constructor methods to start with a capital
    "noarg"         : true,         // Prohibit the use of arguments.caller and arguments.callee
    "noempty"       : false,        // Do not warn about empty blocks of code
    "nonbsp"        : true,         // Warn about "non-breaking whitespace" characters, could be Mac specific
    "nonew"         : true,         // Prohibit the use of constructor functions for side-effects
    "plusplus"      : false,        // Allow the use of unary increment and decrement operators
    "quotmark"      : true,         // Force a consistent use of quote marks but do not enforce single or double quotes
    "undef"         : true,         // Warn about the use of undeclared variables, handy for finding typos
    "unused"        : "vars",       // Warn about unused variables, but not about unused params as methods might get an event param and that would trigger a warning
    "strict"        : true,         // Force all methods to run in ECMAScript 5's strict mode
    "maxcomplexity" : 10,           // Warn when the cyclomatic complexity of the code becomes more than 10
    "maxdepth"      : 3,            // Warn when a method has more than 3 nested blocks

    // Relaxing options
    "asi"           : false,        // Always warn about missing semicolons
    "boss"          : false,        // Always warn when assigning where a comparison is expected
    "debug"         : false,        // Always warn about debugger statements
    "eqnull"        : true,         // Do not warn when using == or != to check for null, this also checks for undefined in the same statement
    "esnext"        : false,        // Give warning when using ECMAScript 6 syntax
    "evil"          : false,        // Always warn when using eval
    "expr"          : false,        // Always warn when expressions are used where an assignement or function call is expected
    "funcscope"     : false,        // Always warn when using variables outside of the control structures they were defined in
    "globalstrict"  : false,        // Always warn when using a global use strict
    "iterator"      : false,        // Always warn when using the __iterator__ property
    "lastsemic"     : false,        // Always warn when missing the semicolon in a one-line block
    "laxbreak"      : false,        // Always warn about possibly unsafe line breaks
    "laxcomma"      : false,        // Always warn when using the comma-first code style
    "loopfunc"      : false,        // Always warn when declaring functions inside loops
    "maxerr"        : 50,           // The max number of errors JSHint will generate before giving up
    "multistr"      : false,        // Always warn when using multi-line strings
    "notypeof"      : false,        // Always warn when using invalid typeof operator values
    "proto"         : false,        // Always warn when using the __proto__ property
    "scripturl"     : false,        // Always warn when using script-targeted URLs
    "shadow"        : false,        // Always warn when declaring a variable that is already defined in the outer scope
    "sub"           : true,         // Do not warn when using obj['prop'] instead of obj.prop
    "supernew"      : false,        // Always warn when using "weird" constructions
    "validthis"     : false,        // Always warn about possible strict violations with the usage of this

    // Environments
    "browser"       : true,         // Define globals exposed by modern browsers like document and navigator
    "couch"         : false,        // Do not define globals exposed by CouchDB
    "devel"         : false,        // Do not define globals usually used for debugging (console, alert, etc)
    "dojo"          : false,        // Do not define globals exposed by Dojo Toolkit
    "jquery"        : false,        // Do not define globals exposed by jQuery
    "mootools"      : false,        // Do not define globals exposed by MooTools
    "node"          : false,        // Do not assume the code will be running within Node.js runtime environment
    "nonstandard"   : false,        // Do not define non-standard but widely adopted globals like escape and unescape
    "prototypejs"   : false,        // Do not define globals exposed by PrototypeJS
    "rhino"         : false,        // Do not assume the code will be running within Rhino runtime environment
    "worker"        : false,        // Do not assume the code will be running within a Web Worker environment
    "wsh"           : false,        // Do not define globals available when running as a script for Windows Shell Host
    "yui"           : false,        // Do not define globals exposed by YUI

    // Globals
    "predef"          : [
        "define",
        "module",
        "require"
    ]
}