I can edit brightness, contrast, color, tint, and sharpness on both my TV and DVD player (Samsung 27" flat CRT and Onkyo DV-CP802).  I have the DVE Digital Video Essentials DVD.  I don't have the greatest system in the world, but it's servicable and I could use this experience when I get a real job and can afford the good stuff.
I've mostly just tried keeping the TV on "standard" and changing things on the DVD player, but I haven't been satisfied with the contrast levels.  Even on the lowest contrast levels, I still see blooming, though by then, it's too dark.  On the TV, I can edit from 0-100 (I assume 50 is neutral).  On the DVD player, I can only edit -7 to +7.  I thought about starting with everything at 50 and maybe playing around with both the TV and DVD, but that seems complicated.
1)  Should I just leave the DVD settings alone (everything on 0) and only mess with the TV settings?
2)  Also, for the TV settings, what should I leave sharpness at?  It's still 0 to 100.  For my DVD player, it's 0 to 7, so I have it at 0.  For the TV, should it be at 0 or 50?  0 looks... a tad unsharp, but I only glanced at it.