We still do restrained recalls on the older dogs to speed them up on 'go outs' and 'to the handler' exercises. Recalls are IMO the most important thing, but don't over do them. We do focus work, perch work(rear end awareness) and positions.
End the session with a restrained recall or two and put the pup up in a crate for some processing time. That crate time is just as important as the training session when a dog is learning something. Goes for the tracking phase as well.