I have an idea to create a new item(s) that are consumables, that have a time duration effect. Craftable items. (similar to that of "redbull"). A stimulant that for example, for 2 hours, enchances your physical attributes by 10% and increases your skill and sau drops by 20%, increases the chance of a global by 5%. Of course, this stimulant should be fairly expensive to craft, so that it isn't used freely but rather at a calculated risk so that depending on what you're doing maybe it would be worth it.
(If there will be a rep system, then there could be a legal consumable (for a lower effect/cheaper), and an illegal consumable (for a higher effect/more spendy).
Thoughts on these type of "items"? I have no specifics in mind, just the general idea.