i say it would be best to have a schedule like this:
10 mins - basic tricks (atws, htws, hatws in long combos, both feet)
5 mins - rest and water break
10 mins - amatw / tatw training. Or some 2 revolution tricks. Focusing on 1 or 2 tricks and trying to combo it.
5 mins - rest and water break
10 mins - try some basic nt combos like tatw - amatw nt (I'm not sure what your level is)
......and there is 40minutes

Increase the hardcoreness as you improve.
I suppose a very quick 2 minute warm-up at the start would have to be squeezed in.