i avoid the atkins bars and splenda like they are the plauge. i like lean meats whole eggs (although they will be dropped infavour of egg whites soon) hard cheese and whole leave salads.
where ever possible i avoid refined foods by working to the simple rule of can't pronounce the ingredient don't eat it. and second one, if you can pronounce it but don't know what it is or where it comes from don't eat it.
its not perfect but its a good general rule.
To infinity and beyond!