Sounds like you might be under-sizing your tubes. The more they have to stretch, the more likely they are to tear, especially on/around the seams. So if you are having problems in that regard, you should always get the largest size that will fit your tire; e.g. a 1.5" tire should take a 1.5-1.75 tube. Avoid the thinnest tubes that are meant for racing, they are kinda delicate for commuting. Also, you might want to make sure your rim tape is seated perfectly, no sharp spots along the edge. It often helps too to apply some talc around the inside of the tire so that the tube can slide around as it inflates and not snag.

The best wheel I ever bought came with both Velox and a rubber strip wrapped around the well of the rim. The only flats I ever got on it were due to defective seams on Specialized tubes, they'd split in no time.