Hey there, here's what I did on my upcoming 19 priest :
1. Choose the right name and level it up to level 10 either through grinding of questing, save the linnen cloth.
2. Grab both fishing nd first aid and level up as you explore the following zones based on your faction :
- all major cities through a mage port
- elwynn forest/mulgore for the fair
- brewing event zones
- outside darnassus for the april fools event
- stranglehorn valt (west coast, arena and bounty bay)
- warsong gulch vendor location
- rep locations for those you want to get (furbolg, argent dawn, etc)
- if you're on a pvp server or planning to transfer, go to open world pvp zones from 10 level below and above level 19.
I assume you take all the flight paths along the way
Once you're lvl 10 and followed this you should be 150 fishing and have all main locations visited, the rest of it (wailing caverns, deadmines, etc) can be explored later on.
At that point you're better off creation another toon (mage/hunter if you plan to use it to finance your twink). Level that toon to atleast level 35 (I'd go 40+ or even 60 if you've time lol).
Make sure to grab skinning and another gathering professions. Sell leathers to vendor straight away and keep herbs/ores for upcoming patches on a bank alt. Only buy spells necessary for farming and send all extra gold on al alt so you don't get to spend it.
In the meantime the level 10 twink should have his HS in Bounty Bay, staying most of the time logged off outside the arena to check every 3 hours to to go up to the fishing island when the fishing contest if up.
If you read it all good job. Might not be the best but that's what I've done so far
Cheers,
Carla