1. He is talented. He needs to practise. (Having said that) →
He is talented. Having said that, he needs to practise.
2. We need to leave. The traffic is heavy. (Basically) →
Basically, we need to leave because the traffic is heavy.
3. Many animals make good pets. For example, dogs and cats. (For instance) →
Many animals, for instance dogs and cats, make good pets.