Arrive a Few Minutes Late
Don't be early for your second date. If your date arrives and sees you sitting there, that could be a sign of desperation on your part, and desperation is not an attractive quality on a woman. It could also send off the signal that you were so taken by your date the first time around that you are impatient to see this person again, which is a sign that you may be easy to get---you want to be a challenge for your date. Instead, arrive a few minutes late. Make sure that your date is there and waiting for you before you get out of the car or have him pick you up.
Pick a Topic to Expand On
The second date is a time to go beyond the general talk that you most likely had on the first date. This is where you can get into more specifics, but don't go into specifics on every detail of your life. Pick one general area, such as your job or your family and focus on that for now.
Allow Your Date to Talk and Flirt
Be sure to let your date talk and expand upon something that you two talked about on the first date as well. Be curious and inquisitive. Ask questions that indicate that you are genuinely intrigued. Flirt with your date to make it clear that you would be interested in another date after this one.
Don't Get Too Comfortable
On the second date you might be feeling on top of the world, as if you have probably already "sealed the deal" with this person, but that is rarely the case by date number two. Do not get too comfortable and assume that your feminine wiles did the trick on date number one, which is why you are here. This is not the time to relax so much that you start to show all of your potential flaws. This person is likely still evaluating whether you are a catch or not on the second date.
To Kiss or Not to Kiss
The second date is usually a time when an intimate gesture comes into play, even if it is just holding hands. It is generally safe to allow your date to give you a lips-only kiss if the second date went extremely well and a third date seems imminent. This is especially true if you already kissed on the first date---if you refuse a kiss on the second date after kissing on the first, that could indicate that you are not really interested.