I rolled the shit out of my forearms and Tricep insertions at the elbow and do a wall stretch with palm supinated fingertips down pressed against the wall Palm flat against it arm locked straight out then turn away and hold for 30 seconds. It's helped immensely.
Gonna train log and circus dumbbell today.
Do you have access to cables? I've found that lightweight cable exercises are an excellent warm up for joints (elbow and shoulders specifically)