Since there are a couple of newbies posting now, asking for advice, I will give just two pieces of advice (and some of the other guys will probably chime in)
First, the BIGGEST mistake a newbie can make:
Go to Russia (or wherever) with a sense of urgency.
That's the biggest mistake you can make. I felt the same pressures when I went the first time. (We hear it all the time: "Sheesh... this is $2500, I don't want to do this again." ... or... "I can only afford to go over twice... once to meet her, once to propose. So I need to find a wife the first time." ... or... "I'm a single dad. My child needs a mom fast!" ... or ... whatever.)
This will almost guarantee you will make a mistake you will regret. You are going over to meet someone. Period. Drill that in your mind. Enjoy the journey. It is a different culture and a fascinating place that was, for a long time, forbidden to us. Have fun. Make it a tourist trip. See the sites. Remind yourself this one important thing:
You don't HAVE to get married.
Really... you don't. You might think you do... but you don't. That will help you relax, have a good time, and see her as she really is.
You will hear stories of guys who have found the one, and it sounds so easy. But with a few exceptions, none of us found the one the first time out. Almost all of us have made multiple trips over, and met several ladies.
So... relax.. and take your time. And as far as going over... get used to it. You're MARRYING someone from there. Don't you think you'll ever go back once she is here? Would you leave YOUR homeland, and never want to go back?
Second: BEST thing you can do... READ THE ARCHIVES! There is a lot of good stuff there compiled by a lot of guys who made big mistakes, and were man enough to admit them, and talk about them so we all can learn. You also will find advice from guys who have been supremely successful, and even some advice from Russian Women who read the board and comment from time to time.
We all are here to offer advice. But it is tough to listen to the same questions over and over again, especially when we know that the answer is in the archive for whoever wants to go look.