Any tips for getting started speed running SMB1 ? Is there an AutoSplit available for use with LiveSplit?

I'm entering the wonderful world of speed running. I have been doing some test runs with livesplit, but am having a tough time trying to manually press buttons to move from one "lap" or split to another. Can anyone give me some pointers or suggestions on how to best manage this?

I'm planning on running the classics (Super Mario Bros, Zelda, Contra, Karate Kid, etc.)