LOL!
30 my ass. If you just try and look older, your never going to get anywhere. Try and BE older. cloths without personality is nothing but a waste of money.
DON'T be immature. Don't swear. Be a good role model. Be PROFESSIONAL.
Sure, you may say its not fun - but you only act like that when its nessesary. When you first meet a broad, when your attending a public function, ect. You have to think of yourself as A MAN. Not a teenager trying to look like a man, you have to BE THE MAN!
As far as looks - DON'T gro facial hair [unless you can grow it thick]. One of hte ugliest things I see guys doing [and I see it everywhere], is growing facial hair when they can't *REALLY* grow it thick. They just look like scrubby KIDS.
As far as cloths - you should always be dressier than you need to be for the occation [unless your playing in a football game, or some ****, obv]. Darker, professional colors [blues reds greens blacks], as well as whites and traditional colors are fine. Don't wear a bright orange shirt if you are trying to look older, its not going to work.
Jewelry - whatever you get, DON'T GET FAKE ****. It is easy to tell real stuff from ****. I doubt many of u guys have too much money, hell, were all in HS, right? This is what I did: I went a WATCH WORLD store. They have high end stuff at reasonable prices. DO NOT GET A "busy" WATCH. Like one of those watches with 984739 dials and buttons on it, KIDS WEAR THOSE. I sugjest a titanium, simple wrist watch. I baught a SKAGEN, and the thing is pretty much indestructable, I love it. It cost me $100 bucks, but it was originally $150, so I lucked out.
As far as all other jewelry, MAKE SURE THEY ARE THE SAME KIND OF METAL AS YOUR WATCH. Thats the only drawback of Titanium watches, you need to wear puter jewelry, its the only kind of metal that matches well. Express for Men has awesome [really unique] rings, and they are about 1/6 the cost of AE/A+F rings.
***Another dont... DONT wear your chain out of your shirt. That is how women wear jewelry, and we are MEN, remember? Also, don't get a giant charm on your chain, KIDS do that. Ethnic/Religous charms always look good, and look a helluva lot more mature than a huge fake gold dragon, eh?
Also, depending on how tall you are, you will look older/younger. Get some nice SHOES with a heel if you're short.
Most of it is genes, but ANYBODY can look a year older than they are. Depending on what your parents gave ya, you could look even older than that, if ya act/look right.