I regularly go astralling. In fact, a lot of people do, whether or not they realize it in the waking world. You see, people generally have two selves.. Their physical self that houses their waking mind, and their astral self. Your astral self often gets around in the astral realms, regardless of whether or not your waking mind realizes it.
There are many in the y-messenger chat rooms, religion and beliefs/paganism, that also have experience with astral projection. I think you'll find some real-time q&a to be quite helpful. However, it seems to be a phenomenon of the paganism rooms that the higher the number, the less people there are, and the more focused the topics. You'll have to be patient, however. For every month I spend on there, I maybe get a day's worth of applicable and serious conversation. When it happens, however, it's goooooooooood!
As for personal experiences, I can give you a bit, but they are, indeed, quite personal...
I lay down as if I'm going to sleep, and at that state between dreams and wakefullness, you'll find yourself in the perfect meditative state for astralling. First, I visualize (that's imagination with force and intent - sounds trite, but try it and you'll see what I mean) a "dream vista" of my choosing. This can be whatever I wish. As the vista becomes tangible to me, that is as I manifest unto it. The first thing I do is raise a shield around me as I sit and collect my thoughts. To do that, again, visualization. In fact, I wouldn't go anywhere in the astrals until you're more than comfortable with forming a vista and a shield. As for the nature of yours, that is up to you. :) It is also up to you the form in which you manifest, but I suggest human, as it's what you know in this life. Don't get ahead of yourself! :)
When I feel I'm ready (don't rush it!) I stand up, stretch my legs, and decide where I want to go. Sometimes, it's certain spirit-energy-hubs. These often manifest themselves in the mortal mind as tangible cities. There's so many that I cannot list them all here. After making sure no entity has any pressing business with me, I set off. Sometimes, instead of going to a public place, I'll try and find a few astral friends I've met over the years, and we find a nice secluded spot and chill. Once in a while, and I'm sure this happens to a lot of astrallers, I get attacked. I'm sure some people find such scary, but you can get attacked in the physical realm, as well... So you're really no safer here nor there. I suggest dealing with astral attackers in a "non-lethal" manner (there's a reason that's in quotes), as sometimes entities have a big brother that they run back to for help... Get the picture? Hee hee!
Sometimes my spirits and I go and find old astral entities that we know of and ask their advice on certain topics. Sometimes we don our helmets and have a friendly sparring match, just for fun. I want to make note that I'm not denoting ownership when I say "my spirits". You can translate that as "my friends".. Showing how we relate, not some vile master-slave relationship.
Sometimes the astralling continues long after my body has actually fallen asleep, yet the mind continues to be conscious of what goes on. This is not always the case, however. Once in a while the astralling session just fades out and I rejoin my sleeping body. Sometimes, I continue the whole night through, and then the alarm clock goes off and interrupts me. Sure, I have to go to work, but there's few things more irritating than having a particularly good astralling session interrupted by something so mundane.
The next night, when I "jack back in", so to speak, I often find that my astral self is still continuting whatever it was that we left off with.. Or even finished that up and then began a new task.