Buy some Arnica 30c. The most incredible remedy to start off with. Watch those bruises and aches from falls, bangs and knocks disappear. If you have a toddler, you will wonder how you ever managed without it. Take it after dental work, after surgery, after intense sports activity, after blows and injuries in sports, after vigorous exercise which leaves your body aching.
Read a book on homeopathy. For those of you who want to get started on the practicalities of using remedies at home straight away, try this one Miranda Castro's "The Complete Homeopathy Handbook":