Make it a daily habit to prioritize working on what's hardest or most stressing you out, first thing in your day. Don't let the urgent, but unimportant (The Eisenhower Square) supplant that which should be done. If you knock out these stressors early, you have a less stressed day.
Eating the Frog can syngerize well with a number of other productivity techniques. Frogs are best identified in advance, say as part of a Weekly Review. It is a form of Time Blocking. Frogs identified in advance can be made to align with your OKRs or made to align with a Commitment Inventory.