Whatever you do, start low. One drop should do it. Just leave it at that for your first time. If you like, you could drop the liquid onto candy. Necco wafers work quite well and smarties are also a good choice. You could just place a drop onto a piece of candy like this, let it dry out, then let the candy melt in your mouth.
LSD can be pretty unpredictable for some people, so you really want to be careful about doing heroic doses with it. Make sure you have a friend with you, preferably one who isn't on anything just to be extra safe. Try to remain in a place where you are extremely comfortable. Pretty much anything that you do will be incredibly fun and interesting during the trip, such as creating art, writing, listening to music, watching some movies, or taking a nice walk outside.
If you are in unfamiliar surroundings with people you don't trust things could potentially go pretty bad. Since this is your first time, I again stress the importance of having a sober sitter, or at least a sitter who isn't going to get too high off of anything. Once you get a good feel for LSD, sometimes it is nice to take a low dose and go out in public (walk or have someone else drive), but you may want to hold off on that for a bit.
Take all of the necessary safety precautions mentioned here on BL in various threads about LSD and on EROWID. Sometimes drugs can be unpredictable so it's always a good idea to play it safe. When I was still using, even when I thought I was being smart, sometimes shit went wrong out of nowhere.
I hope you have a fun and safe introduction to LSD.