Bookmarklet to highlight the 45-75 char range. Helps with picking a width for your content.

45to75.js

javascript: (function() {
    function loadScript(a, b) {
        var c = document.createElement('script');
        c.type = 'text/javascript';
        c.src = a;
        var d = document.getElementsByTagName('head')[0],
            done = false;
        c.onload = c.onreadystatechange = function() {
            if (!done && (!this.readyState || this.readyState == 'loaded' || this.readyState == 'complete')) {
                done = true;
                b()
            }
        };
        d.appendChild(c)
    }
    loadScript('//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js', function() {
        var redOutline = {outline: '2px solid red'},
            textyElements = 'p, li, dt, dd, h1, h2, h3, h4, h5, h6';
        $(textyElements).on('mouseover.red', function() {
            $(this).css(redOutline)
        }).on('mouseleave.red', function() {
            $(this).removeAttr('style')
        }).on('click.red', function() {
            var text = $(this).text(),
                e = text.substring(0, 45), 
                t = text.substring(45, 75),
                n = text.substring(75, text.length);
            $(this).removeAttr('style').html(e + '<span style=\'color: red;\'>' + t + '</span>' + n);
            $(textyElements).off('mouseover.red mouseleave.red click.red');
        })
    })
})()