Skills question

[diernan]

I have recently reached level 20 in harvesting and I plan on harvesting my own materials for crafting.

Looking ahead, I can either choose to prospect specific items (i.e. sources that can be used for shafts) or specific materials (i.e. prospect for sap). I'm thinking of bypassing the specific item prospection and saving my skill credits for specific materials, but I'd like to get some opinions on what I should do.

Thanks.