I pull the front wheel and run a u-lock between the rear wheel (inside the rear triangle), bike stand, and front wheel. I usually can't fit a frame tube through my lock since i have a evo mini, but you might want to if you have a normal sized lock to minimize space inside the shackle to leverage attack with.

ideally you'd be running a NY ulock for front wheel and a ny chain for the rear wheel and frame to a rack, but that would cost like 200 dollars and weigh more than your bike.

lastly, I think usually it's best to get a beat up saddle and not bother locking it at all. my gf had a regal knockoff that came on her bike that I chained with a cheap padlock. a thief cut the chain and stole the saddle, and i'm guessing they thought it was nicer than it really was since it was locked up.