Step 1 - Learn about the processes and issues involved.
Look over the material and make the decision for yourself. Information is the best weapon in any struggle. Not knowing something is bad, but thinking you know something that you don't is worse.
Step 2 - Plan out anything well in advance.
Many organizations will provide you with the tools for action. All you have to do is download them. Be sure that you independently verify what you are acting on or handing out. Well-intentioned organizations get their facts wrong all too often. Look into the product or company in concern for yourself.
Step 3 - Do it.
Be effective. Vandalism and violence can ruin the hard work of passive activists. biofreedom does not support breaking the law to achieve goals, and neither should you.