Try to have patience with yourself and gradually get back on the routine you had before the loss. Grief is exhausting and it is important to be aware of your daily health routines and keep them up. Try to eat regular, nourishing meals. If it is too difficult to eat three regular meals, try four or five small ones. Have nourishing food available to nibble on rather than chips, candy, etc.
Rest is important.
Try to develop regular bedtime routines. Continue with your exercise program or develop a manageable routine. Grief does not have to be as isolating as it seems. Look for a support group, lecture or seminar that pertains to your situation. Meditation is often helpful to help people get the rest they need.