Now that I've got the fundementals down I'm finding much of the game just frustrating and tedious. I have too many dwarves immigrating. Is there any way to turn it down? I'm only in my third year in a very inhospitable climate (tundra) and I've 131 dwarves. I really don't know what to do with them all. I would put more in my military but I already have 20 and they seem to be able to take care of any goblins without even a scratch. Also it seems far too easy to attain sufficient wealth to take everything that I want from the caravans (and that's not much. Why do they have so much useless crap? Oh probably cause everyone else only sells their useless crap like I do!). What do I do with all my dwarves and all my junk?
Build a bigger fortress? Seriously, I always need more dwarves (I modded my population cap up to 300) so that I'd have more haulers and such. I try to keep the military minimal, because I need them for other stuff.
Start making some picks/axes/crossbows and mine out huge areas to give every dwarf a room (yes, I *have* done that with 300 dwarves, and they were 3x3 rooms, too, with all the stone dumped into a quantum stockpile... they also had chests and cabinets), deforest the place, put up a maze of traps, get the military training with crossbows, get multiple copies of every single shop, discover some magma (you DID embark on a place with magma... right?).
Set up the useless migrants to specialize in one skill or a few related skills (e.g. cook + food hauler). Set up carpenter's shops with make beds, barrels & bins all on repeat. Set up a huge farm and put your 50-60 farmers to good use (some of whom should be exclusively farmers). Get a clothesmaker set up and have a few clothesmaking shops that have every job on repeat (the jobs themselves rotate, so if you put 10 things all on repeat, you'll cycle through them). Same deal with leather, but I usually make only armor (including helms, etc.), water skins & backpacks.
Get magma smelters set up and start melting all the goblin crap + whatever else you've got (all on repeat, of course). Carve out giant entire z-level stockpiles, mass dump the stone from them, and tell your dwarves to store furniture or food there. If you have sand (you DID get sand right?), crank out green glass stuff, too. Especially menacing spikes. But raw green glass isn't bad, either, if you want to train up a gem cutter/setter. Speaking of furniture, make a dozen or so mason's/craftdwarf's/mechanics workshops near the quantum stone stockpile and put them to work.
In short, once you get enough dwarves to give them massive amounts of work, FPS is your main limitation. I get things to the point where the stocks are full (e.g. 10k food & booze) and then let the game grind away without me, coming back to check for ambushes/traders/diplomats/migrants/moods.