I would recommend dropping coffee for tea. Switch to tea... (sorry for mocking ;) ). Honestly, while real bean coffee includes caffeine, which energizes you for 30 minutes, it also includes theobromine, which would put you to sleep after 30 minutes; tea (black tea and earl gray) has caffeine only. Instant coffee with milk (like Nescafe decaf) is a good beverage to drink before the bed time, since it contains theobromine only