Here's the ones I do. I find them quick to do and most have a benefit in doing them (high exp, skill training, items, etc). Since I'm lazy, I do the easy ones daily and do some of the long ones twice every other day.
- Daily shadow mission - do easy ones. skip tara castle long ones.
- Handicraft ptj and cooking ptj in Emain. You can do HS dragon quest (cooking) and Belvast food quest together with this, but you need a decent rank in cooking. Some handicraft quests give nickel which you can sell.
- Commerce quest with Kinu in Belvast quest. Do with commerce partner quest if you have her. The Kinu quest is random so you shouldn't bother completing this daily.
- Get the exploration quest from Alexnia. Lots of people do the exploration quest in Cor. I do this twice every other day with single demi god trans.
- Raft and Balloon quest. Skip if you have trouble doing either one of them. These can be done twice every other day as well. You should be able to get 30 rafting kills by the 1st stop.
- Hillwen mine and Shyllen Reserve quests. Do the crafting quests right away as they're fast to do. You can do the kill quests twice every other day.