Originally Posted by substructure

If you can find a crit training race that goes on every week in your area that would be the ticket.
After several weeks of doing these, I was able to go from hanging on in the crits to winning primes to winning out right. It was the best training I could ever do.

If not, 5x5s and even 7x3s work. And one I do as well is 6x2s with 2min rest, a 20min SST, then another 6x2s.