Captains who doesn't have that much time playing but logs in everyday tends to forget doing some of these things. Which basically leads to losing a lot of rewards, especially in the long run. (This guide is made for Captains who doesn't have time to play the game but doesn't want to miss out on the daily rewards either)
But don't worry! I'll show you what you can do everyday to accumulate these rewards and stockpile them for future use. 
To be honest, I've been wondering why I have so much coins and various other stuff, then I've found out it's actually coming from these sources lmao. 
Material Events
- This is where you can get tons of EXP (Experience) and Coins without much effort, in addition to that, you can get Gold Pins as well to purchase valuable items, such as SP Valkyrie fragments, weapon & stigmata enhancement matz (materials), and more.
To navigate there, tap or click on the "Attack" button on the bridge.
Then go to "Material Event" just below "Co-op Raid" and beside "Chronicles".
Tap or click the "Quick LITE" button below.
Then use your energy here.
Rewards depends on the highest level stage you've completed on each event. So make sure to clear the highest level possible if you haven't yet to get the most out of your energy.
Armada: Commissions and Warehouse
- This is where you can receive various valuable items, ranging from coin chests to Valkyrie fragments, as well as Stigmata crafting materials. And occasionally, some dorm supply cards. Rewards may vary depending on how much you've contributed on the commissions, and the items receive from the warehouse depends on the item you've requested.
To navigate there, tap or click on the "Armada" button beside the "Dorm".
Once done, you will be greeted with several buttons below. Let's access the "Commissions" first.
Commissions are basically just you submitting the requested materials, the higher the value of the material, the higher your contribution value.
After contributing on the commissions, go to "Rewards".
The higher your contribution value, the more valuable the rewards you can receive. And the higher the chance you get the desired item(s).
Note:
- Don't forget to collect those rewards the next day, it can be accessed through the "Rewards" menu on the commissions. The "Last Distribution" will be replaced with "Claim" after the reset.
The "Warehouse" can be accessed through the same menu as "Commissions".
Tap or click on the button with the "+" sign on "My Request".
Then choose what to request. Items can range from coin chests to character fragments.
Note:
- Only choose the items that you currently need the most since you can only request one piece of the requested item per cooldown.
Dorm: Coin Supply, Errands and Expeditions
- This is where you can collect coins from the coin supply, EXP chips, enhancement materials, work points card, various fragments (Valkyries & Elf), and basically more useful materials that depends on what stage you chose to do expedition.
To navigate there, tap or click on the "Dorm".
Collect coins from the "Coin Supply". It is located on the "Dorm Bonuses" beside the "Energy Replenishment".
Now let's go to "Expeditions" next.
You could always do story stages, but if you don't have the time, expeditions make sure your energy doesn't go to waste.
Select the stage that has the item / material that you need the most. Then tap or click the "Start" button.
Then just tap or click "Quick Dispatch" located on the lower right of the screen next to the "Confirm" button. Please ignore their levels. 
Here's what it looks like after the timer ends.
And lastly, the "Errands", it is just beside the "Expeditions".
When selecting errands, always start from the errand with the highest rating "S+" if it's available, but usually (based on my experience) "S" and "A" are the ones you will likely get everyday.
Then just keep on dispatching Valkyries on errands with the "Quick Dispatch" button until you ran out of errands to pick or until you ran out of Onigiri.
For more information about errands, just check this guide out.
Honkai Impact 3: Errands and Work Points Card | Honkai Impact 3rd | HoYoLAB
Since the shop is close by, might as well access it in here.
Don't forget to purchase those daily Valkyrie fragments and Elf fragments (if they're available). You can access the "Logistics Terminal" under the "Daily Shop".
Missions
- And lastly, the missions, well...you know the drill right?
Time to claim those rewards!
Just tap or click on the "Quick Claim" button on the upper right corner just beside the BP bar. Whoever made this button is a genius! 
Doing this everyday will give you tons of EXP and various useful stuff as well.
Don't forget to claim the rewards from the "Daily BP" as well, it is just below the BP missions.
Doing this everyday will let you stockpile on crystals and other useful stuff.
Side Note:
- This is pretty much my daily routine every time I log in on Honkai Impact 3 lol. And in the exact same order as well, this basically allows me to complete these tasks in under 3 minutes, if I'm speed running, it may only take less than 2 minutes.
