The first and most important thing you can do if you are charged with a crime is contact an attorney. Whether it be Ross Denison Law or one of Portland’s other fine criminal lawyers, you need somebody to start protecting your interests immediately.
Once you have contacted and retained an attorney, follow their advice. That’s what you pay them for. More generally, take measures to demonstrate that you are a responsible and productive member of society. While this may or may not affirmatively help your legal situation, it certainly will not hurt.