They are useful
They are very useful to people. And people love stuff that they can use. All the better that they can be read in a flash and take next to no effort to absorb.
If you offer quality tips consistently then your followers will appreciate this and keep an eye out for more of them whenever they log in. There's a good chance that they'll retweet them too.
They stand out
Remember that a lot of tweets contain links. Actually, it seems to be the norm in most niches. Yet a tip is self-contained and link free. Such little short tweets do tend to stand out amongst the others. People appreciate the fact that they don't have to click on a link -- another reason they like to read them.
They build authority
Just as good content on a blog builds authority, high quality tips will do the same on Twitter. After a while you'll start to be seen as an expert. More followers and greater influence will ensue.
They are worthwhile on their own
Even if you don't actually tweet all the tips you come up with, just formulating them would be worthwhile. This is because creating them requires that you think hard about your niche, recall the lessons you have learned and pick out the ones that are most useful to others. Then you have to put each bit of advice into less than 140 characters. This is a good writing exercize apart from anything else.
They can be collated
Tips are crystallized, concentrated nuggets of wisdom. And if you create them regularly, before too long you'll have dozens of them on various themes. You can choose one particular theme and then collate all your best tips on it and put them all in a blog post. As bloggers know well, readers love those list posts. They get shared a lot too!
They are great reminders
By crafting these tips and sharing them with others on Twitter, you're also reminding yourself of the tactics that work -- tactics that you may have stopped using for one reason or another. So you can take your own good advice, make a point of utilizing these approaches and reap the rewards.