I have two ways.
Bulk, I usually have a protein shake before I leave for the gym and a couple bananas on the drive.
When I get there, weather I use slin or not (not here recently) I have an intra shake of protein and carbs. I still have it without slin because I figure if the best time to blast our muscles with protein and carbs are during the workout with slin, I don't see why it wouldn't still be a great time to have the protein and carbs without it.
The carbs from the shake and bananas boost natty slin as well during training. Obviously not like an injection before hand.
Cutting I don't run more than 30 - 35 carbs a day. I do a protein shake just before I leave and drink another one during the workout.
Cut or bulk I usually drink lots of water during training and eat a solid meal an hour to an hour and a half after training.