These increase levels of neurotransmitters without any sort of crash effect. They will make ALL stimulants work better, you will recover better from stimulant use and you will recover better from workouts and dieting (dopamine tells the muscle to fire, serotonin tells the muscle how hard it needs to fire, "squat flu" and general overtraining syndrome are simply lowered levels of these neurotransmitters)

5-HTP: 100mg (http://www.bulknutrients.com.au/buy/5-htp/5HTP - Pick a box of 120 caps up for me too) - Serononin + adrenaline precursor
Acetyl-Tyrosine: 1000mg (http://www.bulknutrients.com.au/buy/acetyl-tyrosine/AT) - Dopamin + adrenaline precursor
Alpha-GPC: 300mg (http://www.bulknutrients.com.au/buy/alpha-gpc/ALPGPC) - Choline precursor

These are nootropics, they increase neural plasticity so you learn motor patterns faster, increase focus and also energy.
Noopept: 10mg (http://www.bulknutrients.com.au/buy/noopept/NOPEP) - simply incredible. 20mg is even better than 10mg but 10mg should be plenty when stacked.
Oxiracetam: 750mg (http://www.bulknutrients.com.au/buy/oxiracetam/OXIRA) - Works synergistically with the choline above. Also acts on the dopamine receptor and the AMPA receptors meaning you'll find greatly increased motor control and speed of reaction. It is water soluble.

Obviously get caps wherever possible, one of each will last you 120 days. 4x25mg oxiracetam at 750mg a day will also last you 130 days.
Combine with a B-Complex shot, 1ml 3x a week and you're good to go.