Constancy creates balance, so here are some tips for developing constancy:
1) Build time into your day where you do nothing at all but contemplate or meditate. Even 5 or 10 minutes allows your inner and outer being to work best together.
2) Pay attention to the present moment, instead of thinking ahead or about what happened before. This assure you will spend your time efficiently and that means you will have more time.
3) Do what you say you will do - and don't promise anything to which you are not 100% committed to doing. Then if for some reason you can't do it, clearly let others know far in advance as you can. Being thoughtful of others will help others to see you as a constant person, and you will feel better about yourself as well.