Dailies are no doubt great for cash. And even though they're boring, thyre probably less boring than alternatives.
I dunno if you're Republic or Empire, but Boarding Party normal is a great cash source.
Youtube it, its essentially a speedrun on BP killing all the bosses and grabbing 5/6 chests/lockboxes within about 7-10 mins (Im a tank and it takes me 10 or 11. Dps are naturally faster, and those with stealth even faster).
You get about 30k per run after selling everything, which works out to be a good 150k an hour.
It is no longer viable since you can't use your speeder in BP anymore. Also, I've heard they've nerfed the amount of credits dropping from chests in there.