It may look simple, but that doesn't mean it's easy —
at least not until you watch this video.
This video gives you a short, sweet tutorial on restringing a Telecaster electric guitar with a hardtail bridge, which will afford you the confidence of knowing you did it right. If you just want the quick-hit takeaways, you can read the basic steps written out for you below.
Wind the tuners clockwise to loosen up the strings, then cut the strings at a point near the middle of the neck. You can then easily remove the two sides from the bridge and tuners.
Insert new strings through the bridge and assure the ball end is tight to it.
Straighten out each string until it's past the tuning peg it belongs i
n, then clip it at a point slightly after the next tuning peg (or about an inch and a half).
With the string at the appropriate length, insert it through the hole and into the slot on the tuning peg, wrap it around a little to get it tight, and wind until it's tight to tune.
Repeat with each string, tune it to pitch, and stretch the strings by pulling them a bit along the neck.
While your guitar tuning may fluctuate a bit as the strings stretch, necessitating some retuning, you'll be good to go with a set of fresh strings.