Your tweets should be interesting to your target audience. People aren't going to follow you for long if you make off topic and low value tweets.
❌ Figure: Bad example - "Having lunch" is not an interesting tweet
Some good examples of things to tweet about:
One week before an event, tweet about the event to raise awareness
One day before an event, tweet about the event and what you are talking about
On the day of the event, check-in on foursquare when you arrive (gives people a nice map)
When something good happens to you. E.g. You beat your boss in an arm wrestle
Tweet before and after installing new software or after an upgrade. E.g:
✅ Figure: Good example - An informative tweet with hashtags and relevant links for a targeted audience of IT followers