TL;DR: Some daily quests overlap with challenges, active the challenge before you start the quest to get some extra loot!
This is just a very simple tip, which many probably figured out already.
I however, completely forgot about challenges! There are challenges which you are doing anyway, and require no extra effort.
In crimson badlands you can activate "Living stone" and "Coastal Scarhide Executioner" for killing scarhides and shard of aggressor's, as well as "Life Splice" which gives you an item to use on palehusks making them even easier to kill!
In Northern wastes you can active "Douse the Ghostpyre" for the moodie kill quest, "Frostbitten Foes" along with the holdout/cavern quests. I haven't checked what mobs are needed for "End the suffering", but you get the idea by now.
For those of you who dont know how to start a challenge (lol), type L, go to challenges, click on the zone you are in and find the challenge you want to do. Click start. Yeay!