On clothing :

I was diddling with the stiffness setting on cloth, particularly on the main character's jeans. Ran the sim, was pretty happy with it, until I noticed that his cuffs were slipping below his heel. Examining still further, I discovered that as he walked forward, his jeans slipped further and further. From his waist.

Wardrobe malfunction!
It looked like he was "sagging" his jeans.

Ended up having to bring the stiffness up considerably.
Now he doesn't walk out of his pants.

Clothing sims are otherwise going well.

A sim test. Walk cycle is just for testing. Cloth proves to be robust. Yay.

that looks promising! I recall someone had success by deleting mesh in the arm pit areas that was causing needless cloth collision fiddling.

Jesse

I have started putting cloth on the characters, and was needing some help. Where are you attaching the cloth for example the shirt?

Steve

I actually don't attach the cloth, which may or may not be best practice. (I find the simulation gets kinda wild at attached points)
This may have something to do with using fairly low-patch meshes for cloth. (cloth likes DENSE meshes.)

Allot about ~25% of time for cloth trial/error/sim, resim.

Also, the settings vary depending on model "size" (in cm, the virtual scale of the model.) High stiffness can sometimes help, other times - not so hot.

I would definitely recommend starting with unattached cloth.