Somewhere along the lines, I heard what I think is a great piece of dating advice.
Never make plans for the future that are further in the future than your past together.
In other words, if you've been dating for a week, don't make plans past next week. If you've been dating for three months, don't make plans more than 3 months in the future.
Its a great rule of thumb to keep yourselves from getting too far ahead of yourselves, and I think it makes you less likely to buy that plane ticket to Thailand that you might regret after you learn more about the person you're dating. It also keeps you from freaking the other person out with stuff that isn;'t first date material – i.e. until you've actually raised a child and sent him off to college, don't talk about taking your grandkids to Disney. I've never seen anyone go that far, but I have known people to get way ahead of themselves.
Relax, enjoy the natural progression of things.