Marriage
To get married, you need to wear an Amulet of Mara, then speak to a valid non-player character (NPC) who can be married. If they’re interested in you (usually requires a quest first) and you’re interested in them, you’ll be able to initiate a ceremony and get married.
Aside from moving in to their home and having them cook meals for you every night, I found very little use for marriage in this game. As I mentioned in my review, I eventually got bored and killed my wife with magic and fire. I like to keep my options open.
Dragon towers
If you’re running through the wilderness and you see an icon resembling a dragon appear on your compass, make sure you check it out. There will be a dragon waiting for you, as well as a new Shout to learn, and in most cases a treasure chest with some quality loot. Just make sure you save before going in arrows blazing or what have you.
Climbing mountains
Skyrim has a lot of hills and rocky mountains that usually stand between you and your destination. But if you want to go from point A to point B without taking a mile-long detour, there is a way. As longtime Elder Scrolls fans will know, the franchise has a history of allowing you, unintentionally, to scale vertical mountains. All it takes is a little persistence and a lot of jumping. The trick is to find the least steep spot and move at a diagonal angle towards it. If you can’t run anymore, try jumping. It usually takes some effort, but I’ve yet to encounter a mountain I couldn’t overcome. Once you get the hang of it you’ll be scaling sheer peaks as if you were hopping over traffic cones. If you’ve bought a horse, they allow for even less realistic traversal of Skyrim’s environments. I’ve literally had my horse stuck perpendicular to the side of a mountain more than once.