... even if the project is pulled out of a neglected corner, after many months of hibernation!
Having all these points marked out help me keep track of instructions that occur at the same time (as so often is the case with garment patterns) and to be able to check my work at one glance!
I also use the kind of safety pins with the rounded bottom (some call them bulb pins) as normal stitch markers. They'll always be my favorites, even if they are not the cutest out there, since they are removable, lightweight and very fine (and therefore don't leave any ladders or unsightly marks in between my stitches).
You might also like to take a look at the Fringe Association Blog, where Karen posts many interesting things related to knitting!