Coffee is great, but drinking too much has been linked to anxiety and depression. However, there are some great alternatives that will give you the energy boost you need.
White, green and black teas will give you a boost but without jitters or the crash. Matcha packs a nutritional punch, will give you a boost and has also been linked to lower cancer rates.
Ginseng and licorice root tea is good for a more subtle energy boost. And there are many other options that will keep you healthy and happy.