There's uh, a lot of tips players here can offer depending on the context you mean. I'm far from the best this community has to offer for generally making a base pretty but there are some tips I figured out the hard way over time that maybe I can spare you the pain of (no idea how long you've played, this might not be new to you at all).

-It's easy to forget to eat when putzing around your base in seemingly total safety, but don't make this mistake. If the fall damage from your own building efforts doesn't end up claiming your life a time or two, an unfortunately timed raid might instead...or the delightful occasional ranged enemy that wandered in from a nearby biome while chasing other mobs (*sarcastic* always love getting knocked off a 2+ story building by an arrow out of nowhere while Im arguing with my chimney up there).

-Moats and earth walls are technically the best defense, but they also aren't always the prettiest or most immersive approach to base defense. If you do forego these, DO NOT put your defensive walls right up against your actual structures. This will be deceptively effective for most the enemies you are used to like those pestering little greylings but there are enemies that will remind you exactly how much range they have...by bashing your skull in through your walls while you are obliviously cooking your dinner or something. Give your defenses some space to actually defend you.

-Never underestimate the power of your rested bonus, seriously. All you technically need is to sit down next to a currently working fire for about 30 seconds and that's enough get like 8 minutes of rested i think? 8 or 10, but i want to say 10 is when you have fire + sheltered but both are so easy to accomplish I can't actually recall specifically. Adding additional items that grant comfort, like a rug or a banner for example, will increase how long this effect lasts before you need to rest again to get it back. Either way, you regain your health and stamina faster while rested and im fairly certain you also get a global xp gain boost as well (admittedly i dont tend to watch the skills that closely). Technically not specifically about building, but the stamina recovery helps with building and you use building to increase your comfort so your rested bonus lasts even longer (not all decorations count towards comfort but most of what counts, are decorations. Things like your bed also contribute, and you cant rest/sleep at all if not in range of a fire. Though you can respawn at a bed without a fire near it).

-When you get far enough to be exploring continents and going on long sea voyages, I recommend always bringing extra food, at least 10 wood (for a workbench, +2 and another 5 stone if you also want to drop a fire for that previously stressed rested bonus), and a portal kit (the materials needed to create a portal, presumably with an unconnected one already back at your home to pair it with. So: 10 greydwarf eyes, 20 fine wood, and 2 surtling cores). Yes, a bed to respawn at is nice, but its even nicer to actually be able to go back home and try again if everything goes horribly wrong (boat broke, cant find the nails in the water to name a common example.