Go to a convention.
If you mean by buying them, you can find them on Ebay and other sites for anywhere from 20 dollars to over a hundred (depending on the object that is autographed and the importance of the actor that has autographed the certain item.) If you mean in person, you can find autograph opportunities at Star Trek and/or Star wars conventions or other events that actors have volunteered to autograph at.
All of the main actors from Star Trek(2009) have signed on for at least two more films. Star Trek XII is slated for release on May 17th, 2013, and a release date for Star Trek XIII has not been announced yet.
You can always try an anual ComicCon or an event that involves Star Wars.
In order Star Trek: The Motion Picture Star Trek: The Wrath of Kahn Star Trek: The Search for Spock Star Trek: The Voyage Home Star Trek: The Final Frontier Star Trek: The Undiscovered Country Star Trek: Generations Star Trek: First Contact Star Trek: Insurrection Star Trek: Nemesis Star Trek (plain and simple Star Trek)
nothing really but if it was signed by one of the characters it would be worth alot
Star Trek: The animated Series (1973) Star Trek: The Next Generation (1987) Star Trek: Deep Space Nine (1993) Star Trek: Voyager (1995) Star Trek: Enterprise (2001)
Star Trek: the Motion Picture Star Trek: The Wrath of Khan Star Trek: The Search For Spock Star Trek: The Voyage Home Star Trek: the Final Frontier Star Trek: The Undiscovered Country Star Trek: The Captain's Summit That's all the movies in order.
Star Trek: The Original Series Star Trek: The Animated Series Star Trek: The Next Generation Star Trek: Deep Space Nine Star Trek: Voyager Star Trek: Enterprise Star Trek: Bridge Commander (TV Series)
7 Star Trek The Original Series Star Trek The Animated Series Star Trek The Next Generation Star Trek Deep Space Nine Star Trek Voyager Star Trek Enterprise Star Trek Bridge Commander (TV Series)
Star trek
'Star Trek' and 'Star Trek Into Darkness' .
Yes he has been in the following: Star Trek: The Motion Picture, Star Trek: The Wrath of Kahn, Star Trek: The Search for Spock, Star Trek: The Voyage Home, Star Trek: The Final Frontier, Star Trek: The Undiscovered Country, Star Trek: Generations.