"These aren't just steps to pull ourselves out of this immediate crisis. These are the long-term investments in our economic future that have been ignored for far too long," Obama said in the weekly Democratic address.
The goal is to take it quickly through Congress, with help from both parties, after Obama takes office Jan. 20.
The plan, which envisions those new jobs by January 2011, is "big enough to meet the challenges we face," he said.
Obama noted the growing evidence the country is "facing an economic crisis of historic proportions" and said he was pleased Congress passed an extension of unemployment benefits this past week. But, he added, "We must do more to put people back to work and get our economy moving again."
Nonetheless, he said, "There are no quick or easy fixes to this crisis, which has been many years in the making, and it's likely to get worse before it gets better."
It will take support from Democrats and Republicans to pass the economic plan, Obama said. "I'll be welcome to ideas and suggestions from both sides of the aisle," he said. "But what is not negotiable is the need for immediate action."
People "are lying awake at night wondering if next week's paycheck will cover next month's bills," if their jobs will remain, if their retirement savings will disappear, he added.
The Labor Department reported that claims for unemployment benefits jumped last week to the highest level since July 1992, providing fresh evidence of the weakening job market.
"We'll put people back to work rebuilding our crumbling roads and bridges, modernizing schools that are failing our children, and building wind farms and solar panels," Obama said.
He also made a commitment to fuel-efficient cars and alternative energy technologies "that can free us from our dependence on foreign oil and keep our economy competitive in the years ahead."
Obama pointed to the past, saying that Americans in this country's darkest hours have risen above their divisions to solve their problems, as a hope for the future.
"We have acted boldly, bravely, and above all, together," Obama said. "That is the chance our new beginning now offers us, and that is the challenge we must rise to in the days to come. It is time to act. As the next president of the United States, I will."
By Associated Press Writer Will Lester