1. calls: I've had very limited success. Far more often than not, the deer either ignore them or leave. I've killed 2 deer that I can say for sure came to the grunt call. I take antlers to the woods in the early season.
2. Scents: I'm too cheap. I take two 35mm film canisters with me to the woods and take the urine from deer I've killed, if there is any, and mix it 50/50 with water. I freeze leftovers for next year.
3. decoys: I'm too lazy and too cheap.

Good luck.