How to become a better swimmer...

So, Jen and I are riding on Saturday and she says to me "I've been thinking about your swimming andyou're not gonna like me...do you want to hear what I think?" Of course I do! So she proceeds to say "the only way you are going to get better is to double your time in the pool, if you are spending 2 days a week in the water, you need to spend 4...2 days of nothing but drills and 2 days of straight swimming, no rests and if you have to rest 10 seconds...nothing less than 500 yards per set". WHAT?!?!? Okay, I already knew this, but damn now it is really real and I know that I have to do it! 2:19:42 I have to remember this time and it should push me, the 70.3 is 7 weeks away it's go time!