I find it difficult to understand how to translate some english expression you use to "link" sentences, in order to make your language more fluent. For example:
"Ok let's meet tomorrow at 9... By the way, you can ask your friends if they want to join us"
"blablabla(long speech going on)...anyway, let's cut this boring conversaion, I want to show you my new car" --> change of topic
"I forgot to buy the cake. It doesn't do much good, anyway"
How can each of these sentences be translated in russian? Please provide me with some variants (if they exist) of formal/informal kind.