Get your baby to sleep 8 hours through the night at 8 weeks and 12 hours at 12 weeks. Basically BabyWise but she breaks it down so you don't have to read the book. This stuff works! Getting your baby to sleep is totally a science.
Did these exercises with Z from 9 months until 2. He HAD it - was jumping into the pool unassisted, was able to hold his breath and stroke/kick underwater. Then we sat out for a year. Now he is terrified of getting his face wet or jumping into the pool, and we are starting back at square one.