Buhari said this on Monday when he hosted some governors, legislators and All Progressives Congress (APC) chieftains at his Daura home in Katsina state.
The president spent his Eid-el-Kabir holiday in Katsina.
The commander-in-chief said he would do his best before handing over power to the winner of the 2023 presidential election.
“By this time next year, I will have made the most out of the two terms, and in the remaining months I will do my best,” the president said.
“I wish the person who is coming after me the very best. I am eager to go. I can tell you it has been tough.
“I am grateful to God that people appreciate the personal sacrifices we have been making.
“We are a lucky people and we need to reflect more on where we are coming from.”
Buhari said the insecurity in the north-west has become a serious challenge, but that some successes have been recorded in the south-south and north-east.