Intrade posts odds on which party's nominee will win in each State and, therefore, take each State's electoral votes. I assign all of a State's electoral votes to the party that is expected to win that State. Where the odds are 50-50, I split the State's electoral votes between the two parties.
As of today, the odds point to this result: Democrat, 302 electoral votes; Republican, 236 electoral votes.
U.S. House and Senate
How did I do last year? See this and this.