I’d start tapering now. Go for a shorter run next weekend, and run during the week on the same days you usually do, but a bit shorter and/or easier. Then probably don’t run at all for several days before the race.
Get your gear sorted the day before (number pinned on correctly, timing tag on your shoe, gear all laid out and ready). You don’t want to be running around sorting that all out on the day.
Food: carb-loading is good for long distance. Maybe not necessary for a half, because you’ll have enough stored carbs to get you more than 13 miles. But a pasta is probably a good meal anyway (tomato-based sauce, not heavy cream). Agree with Ant about the light breakfast. Personally I find toast fine, but you may not.
Have fun, don’t be afraid to walk early and conserve your strength.