For everything UP to DF … you just follow the old guides. You’re either going to spend a decent amount of time farming some old mats, or spending a lot of gold.
But for DF and tWW, you are going to be HARD time-gated.
Pro-tip:
1> Get the weekly quest in DF for crafting orders.
2> Go to each individual crafting table and do the weekly quest for that profession.
3> Go to Dorn. Get the weekly quest for crafting orders.
4> Now, do your crafting orders using patron orders… and it will complete BOTH of the crafting order quests for DF AND tWW!
5> Do the individual crafting orders for each proff.
6> Get a Treatise for DF and tWW from an Inscriptionist. I mean, you should have one of your own for this, right? 
7> If you have extra time, for DF you can use Sturdy Expedition Shovels and earn +7 pts a week by digging in the dirt.
For tWW, you don’t need a shovel, just fly around and dig in dirt/wax (make sure to get the quest in Ringing Deeps). Although I think it’s only 5 pts/ week.
Note that digging for points is random and is often quite time consuming. This often isn’t worth the effort, it was basically a “freebie” when it was current content.
But all of the DF/tWW stuff is going to get you like 10 pts a week when you need 500+ pts to max a profession out. It will take a LONG, LONG time. And you have to put A LOT of time and material in to it.
tWW and patron orders did a lot of good things, but it’s still a MONSTROUS grind.
edit: My post is about maxing every SPECIALIZED node in DF/tWW. The OP might only be interested in “filling the bar to 100.” Which… isn’t really that hard.
Just filter for “what gives me a skillup” and… make those items.
Maxing every specialization node is much more of a challenge.