I have no problems, as I use my tractor all year round. My current tractor battery is over 5 years old now, and still strong. Assuming you don't plow your driveway though...
It can help to pull the battery and store it in a warmer place, rather than leaving it all winter in a cold garage. A quick charge in the spring may be necessary to bring it back to form, although I have never found it necessary. For example, our boat battery spends winters in our basement, and has always been ready to go with no charge at all.
Make sure the water is topped off, unless it is a sealed battery. (Tractor batteries seem not to be so in my experience.) Use distilled water for this purpose.
Keep your battery posts clean. Bad contacts will prevent the battery from charging, and will make it seem like you have a dud for a battery. You can buy some stuff (from an auto parts store) to paint onto the posts to inhibit corrosion.
Check the wires to and from your battery. Are they loose or frayed? If so, tighten/replace them.
When you replace the battery, get a better battery than the default stock. For a few dollars more, the extra reserve amps will help to start your engine.
Take care of your tractor. Put stabilizer in the gas if left for some time. Change the oil at least once a year, more so if you push the beast or live in a dusty area. Keep the air filer clean.