Try this recipe, it's the simplest and best I have ever had. No triple sec, OJ, sour mix, etc. necessary.
Make simple syrup by adding equal parts sugar and water, shake well (or boil if you really want it dissolved completely, but I normally do not do this). Now fill a pitcher with equal parts of that simple syrup, a good reposado tequila, and freshly squeezed lime juice.
Rub one of your lime rinds around the rim of a glass, dip it in sea salt. Fill the glass with ice cubes (or crushed if you prefer). Fill it up with your margarita mixture, then shake well.