Please try to do them in the first attempt, if you forget it, you can't sign it just like that, it will give the wrong timestamp (say you edited at 6:08, and forgot to sign it, something you fix at 6:11), thus making it inaccurate. I'll suggest that, if you forget to sign, use {{Unsigned}}, the parameter in your case would be {{unsigned|Sasshen}}. The result will announce you left an unsigned comment, but still redirect to your userpage, your talk page and contributions. Thank you. Masatoshitalk 06:08, 29 June 2011 (UTC)
) button at the top of the edit window.