Arm warmers. Get a pair of arm warmers. That way you can switch from short sleeves to long sleeves if it gets cold. Bar plugs. Your handle bars ...

Jump off curbs. Practice riding off sidewalk curbs to get the feel of dropping over obstacles. Jump on curbs. Practice jumping onto curbs to get...

Bend those elbows. Keep your elbows bent while you're riding. Bring air, levers and tubes. Make sure you have a portable pump or a CO2 dispenser...