I'm 38 years old, and have been a vegetarian since I was 14. I'm lacto-ovo, so I eat dairy and eggs.
I must say it was very easy for me to become vegetarian, because it was a moral issue for me--my parents have told me stories about how I refused to eat meat starting at age four, when I learned where my McDonald's hamburgers really came from.

To be honest, the health benefits were always secondary to me; but as heart attack, stroke, diabetes, high cholesterol & triglycerides, etc... run in my immediate family, I'm aware that my diet can help lower my risks of these conditions. That said, vegetarians can still eat poorly--I researched a lot about proper meat alternatives, but I don't always follow them as I should. The eating pattern I've fallen into since I have a husband and child for whom I cook, is basically that I eat everything on my plate but meat. If I make chicken, baked potatoes and a veggie, I have a little bit bigger potato and maybe dress it up with more toppings, and eat a little more veggies. There are other times when I'll make something like a big pot of my MIL's yummy spaghetti sauce with meat, but reserve a little for myself made without. My dh has high cholesterol and tri., so I've added a little more meatless options to our dinner table--he balked at first, but now asks for them. Sometimes it's a pain to make a meatless version of a dish for myself, but I've done it for so long that it's just second nature.
I have no problem eating out at resaurants--many restaurants offer veg. options now, and there were only several times I've had to ask for an entree to be made without the meat. I ask politely and explain that I'm a veg. and can't say I've ever had a problem.

I never expect that when I go to someone's home for dinner, that they make special food just for me. My MIL always does, and I greatly appreciate it, but I don't expect people to change their habits just for me. I've gotten really good about "eating around" the meat, that if you were eating dinner with me, you'd probably never even notice I had none on my plate.
I've had to really watch food labels, as I don't eat products with animal broth or fat. I bought some vegetable soup one day, and found out it was made in chicken broth, so now I make sure I read labels or look for items that specifically say 'vegetarian.' That may not be an issue for you depending on 'how vegetarian' you want to become--I've tried to go completely vegan, but I just couldn't give up my dairy! Mmmmmmmmm....cheese.
There are a lot of vegetarian websites with nutrition info, recipies, advice, etc... Read up and start at a level with which you're comfortable. If you don't think you can go vegetarian 'cold turkey'--so to speak

--try just limiting your meat intake for the week, and go from there.
Good luck!
