I think u missed this one, knowledge. U had tried submit to many different social bookmark but still show some achievement.100 sites!!Too many dude. I suggest you focus 2 -5 sites to gain some traffic there.
Social bookmark sites that I suggest are del.ic.ous, stumbleupon,digg,facebook and twitter. The effectively is stumbleupon coz u need a few votes from visitors, at least 5. Compare to digg.com,the requirement to get in top rank at least 200 diggs, it is too many. U must tell your friend to digg your submit stories dude.
Quality ,not quantity,ok?