also, be sure to brush the white gunk off your tongue: that's the bacteria that causes bad breath. if you don't want to use a brush to get that nastiness off, you can use a spoon or a specialized tool for that.
only floss the teeth you want to keep! bacteria build up between teeth and cause bad breath and tooth decay. string floss isn't your only flossing option anymore: there are numerous different types of floss picks, and even the water flosser to turn flossing into a pleasure. make sure you use correct technique, otherwise you'll hurt yourself. practice makes perfect!
an electric toothbrush is cheap and will be one of the best investments you can make for your dental health. technique is always important.
whatever you pay for in dental hygiene, you'll gain a hundred-fold in dental health! preventative measures are always cheaper and easier to deal with than corrective procedures like root canals, teeth extractions, fill-ins, and dental replacements.
Do you regularly brush or scrap your tongue? You should always do that while brushing. Get a tongue scraper. There are different ones you can try, including one with gel. I've also heard that gargling with salt water or salt rinse mouth wash can help.