Mention automatic get_input_peer

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@@ -27,7 +27,7 @@ client.disconnect()
 
 ## Side notes
 
-As a side note, you will often encounter these lines:
+As a side note, you may often need these lines:
 ```python
 from telethon.utils import xyz
 from telethon.helpers import zyx
@@ -35,6 +35,16 @@ from telethon.helpers import zyx
 
 The first one `utils` are only utilities, which are not related per se to the Telegram API. On the other hand, the `helpers` are indeed helpers to work with the Telegram API, and to make some tasks less cumbersome.
 
+The most common imports are the following:
+```python
+from telethon.utils import generate_random_long
+from telethon.helpers import get_input_peer
+```
+
+The first one generates a random long, as its name says, and will be called automatically if a `Request` has a parameter called `random_id`, so you can leave this unspecified.
+
+On the later case, `get_input_peer` will convert an entity, such as an `User`, a `Chat` or a `Channel` into its correspondent `InputPeer` type to save you from the hassle of writing it manually. You can either call `get_input_peer` to save a few `isinstance` checks which would otherwise be executed when constructing a `Request`, or leave the requests do its work. Note that types requiring an `InputPeer` as a parameter will **not** call this method, so you do have to call it on those cases.
+
 ## Possible problems
 
 If you ever receive a `PEER_FLOOD` error or aren't able to perform certain requests, it might mean that your account is limited, and there's not much Telethon can do about this. Talk to [@SpamBot](https://t.me/SpamBot) for more information, or refer to the [spam FAQ](https://www.telegram.org/faq_spam).