flats can be extremely frustrating - so you may want to figure out the cause. flats on the inside (rimside) of the tube can be attributed to rim, liner, or under pressure issues. flats on the outside of the tube(tireside) can be attributed to road hazard.
once you determine this by locating the hole in the tube (assuming there is a pattern ie:the holes are in the same places) then you can resolve this problem with much greater confidence.
good luck