Fiber capsules have been upsetting my stomach, and I've been having real fiber issues, so I've been using ground flaxseed like this:

pour a few ounces of heavy whipping cream into a cup or tupperware container that has a tight fitting lid, add a half tablespoon or so of unsweetened Hershy's cocoa (3 carbs/2 fibers = 1 net carb per full Tbls), some splenda to taste, and 2 tablespoons of flaxseed meal. Put the lid on and shake it until you don't hear liquid anymore (but not too much, otherwise it will turn into butter). You're making whipped cream, basically, or a version of chocolate mousse. With just a few ounces of cream, this doesn't make more than a few really big bites, but it sure is a more enjoyable form of fiber than the pills. Beware, the amount of cream you use is where the extra carbs can slip in -- I really have to watch myself. I also do variations on this, sometimes adding a pinch of chopped walnuts or unsweetened coconut (more fiber).

Good luck- Athena