Organizing your email in the Gmail way, by conversation, is very handy. What always annoyed me in the Google implementation was that the sent emails did not appear in the default folder. I know it is called Inbox. But sent messages do appear there, too, as soon as the recipient replies to me.
When I used other email clients, like Pine or Thunderbird, I used to set up FCC (folder carbon copy) in the outgoing messages to my Inbox. This gave me a conversation-like structure better than the one found in Gmail. Finally, I have the same structure in Gmail.
To see all your outgoing messages in (so called) Inbox, even when there are no replies in the conversation, create a new filter. Put your address to the From: field. Click "Next Step". Select "Never send it to Spam" and "Create Filter". That's it.
