If you get blisters on your heels, or if your heels tend to slip around in your shoes when the trail gets rocky, there's an easy solution. You know that extra weird shoelace hole at the ankle of your running shoes? You can use it to tie a lace lock.
A lace lock, or heel lock, creates some extra friction between the laces at your ankle so you can keep the ankle and heel area tight, without having to tighten the whole shoe. Here's how to do it:
The trick also works on shoes that don't have the extra hole; just use the top regular hole instead. Try it in your hiking boots, your climbing shoes, or anywhere you need some extra snugness.
How To Tie a Heel Lock [North Face]