What else can I do to avoid a raynaud’s attack or provide quick relief?

Always keep warm. Other than treating the underlying condition(s) causing raynaud's symptoms, avoiding emotional stress, keeping warm, not smoking, and avoiding caffeine, some medications can help. Nifedipine, diltiazem, losartan, and prazosin have been used in patients with raynaud's phenomenon, to block vasospasm and/or relax vessels so they can dilate to let more blood flow through them.
Stay warm. Symptoms of raynaud's are brought on by exposure to cold and emotional upsets. Wear warm gloves and shoes when going out in cold weather. Better yet, avoid going out in the cold. Quick relief is obtained by warming hands and feet in hot water, but don't burn yourself. A temperature of 98-110 should be ok.