What merlin said.
This is how I set mine up (except I now have a -28 degree stem):
1) Aerobars + Bars moved down further (not totally shown here, this stem is -16 degree)
2) Seat is moved forward (i keep a spare seat on a spare seatpost setup just for that position)
3) Got a free wheel cover for the back wheel during a sale
4) Found a cheap TT helmet and got a tight fitting jersey
5) lots of time riding in this position