Well, many things have already been said, but here's my go at it:

1.) NEVER close your eyes if you're new to LDing. This will end your dream a lot of the time if you're not used to it yet.

2.) In order to travel somewhere or go somewhere, the door technique is pretty good. Either find or summon a door and approach it. Before opening it, you have to believe where it will take you. Don't think, "I want to go to Iceland." Instead, try saying something like, "I know this door leads to Iceland." That way, instead of suggesting where you want to go, you force the door to take you where you want to go.

3.) For help with summoning a door, just turn around and try the belief thing again. When you're about to face back, forget about what used to be there and picture a specific door right there. Constantly keep that picture in your mind while turning, and hopefully you just made a door. If this doesn't work, you could try doing what I've been doing and just making a door. Sometimes the summoning didn't work for me, so I tried another forceful technique. Just try grabbing into the wall and molding it apart into a hole, imagining where you want to go on the other side.

Again, hopefully these posts helped, but all in all, everyone has different methods and techniques that work for them. Sorry to say, but there's no universal way of doing anything in a dream. After all, it is YOUR dream and YOURS alone.