Some simple tips, but not all knows about it

First of all, use this pic look like checkbox

When you start train warriors, try to manually select the number of troops whose training time will be equal to the time of any acceleration

As example:

I want to train a lot off t1 melee, i manually select the number of troops whose training time will be 3 hours, to use 3 hours boost. Then I remember the number of troops and the next time I simply enter it

If u don't know which equipment you need to train troops, there is great table made by SOLERRI

https://plarium.com/forum/en/vikings-war-of-clans/game-tutorials/103069_card-mono-farm/