I'll give an example from yesterday...There you go. This is your 5-4 season. You may be trying too hard. You may be getting more challenging games. You may be encountering situations you've not faced before.
Take a step back from the huge swathe of information you have and break it down to individual scenarios. For your first caution yesterday what was the reason for it? Could you have done anything earlier in the game that might have prevented the issue of the caution? Did you miss anything or dismiss it as not important in the build-up to that incident? What was your position relative to the incident? Might your proximity to play allowed you to influence player behaviour? Could you have used your voice more proactively? Could you have slowed down a restart just before this incident to take the heat out of the game?
These and a thousand other questions need to be answered by you before you can start blaming yourself. You'll probably find there was little you could do in that situation. Then move on to the next one...
1st caution - player commits 2 fouls in about 7-10 seconds so I've cautions straightaway without thinking, maybe a warning was a better option but then again he got up and immieadiatley fouled someone else so instinct said caution... A warning would've possibly prevented him being sent off later on but could've made things worse...
It seems that whatever I try gets thrown back at me by the players