user516: Let's assume that either a bug report exists already, or the problem is unlikely to be caused by a bug.
What I know so far is:

This site will be appropriate for some support questions, and the mechanism for the site encourages peer review of each answer. Here's an example of a support question.
The bitcointalk forums have a technical support category that is likely to give a good response as there are lots of active users.

Where else might I get timely support? (paid or unpaid)

user153: If it is a problem such as a bug that might affect other users, the community wants to know, find the root cause, and document or fix the behavior.
If it is a feature request or suggestion for improvement, there are processes for those as well.  e.g., BIP submissions.
There is help from professional service organizations that offer their services as well.

http://www.BitcoinConsultancy.com
http://helpcoin.com/contact.html


user888: I think you have mentioned them all:
bitcointalk, 
bitcoin.stackexchange, 
github issues page, 
bitcoin-dev.
For commercial companies offering bitcoin client support see Stephen Gornick's answer. 

516: <p>Let's assume that either a <a href="https://bitcoin.stackexchange.com/questions/1301/how-do-i-report-a-bug-in-the-bitcoin-client-application">bug report</a> exists already, or the problem is unlikely to be caused by a bug.</p>

<p>What I know so far is:</p>

<ol>
<li>This site will be appropriate for some support questions, and the mechanism for the site encourages peer review of each answer. <a href="https://bitcoin.stackexchange.com/questions/3487/99-done-for-over-1-hour">Here's an example</a> of a support question.</li>
<li>The <a href="https://bitcointalk.org/index.php?board=4.0" rel="nofollow noreferrer">bitcointalk forums</a> have a technical support category that is likely to give a good response as there are lots of active users.</li>
</ol>

<p>Where else might I get timely support? (paid or unpaid)</p>
 153: <p>If it is a problem such as a bug that might affect other users, the community wants to know, find the root cause, and document or fix the behavior.</p>

<p>If it is a feature request or suggestion for improvement, there are processes for those as well.  e.g., BIP submissions.</p>

<p>There is help from professional service organizations that offer their services as well.</p>

<ul>
<li><a href="http://www.BitcoinConsultancy.com" rel="nofollow">http://www.BitcoinConsultancy.com</a></li>
<li><a href="http://helpcoin.com/contact.html" rel="nofollow">http://helpcoin.com/contact.html</a></li>
</ul>
 888: <p>I think you have mentioned them all:</p>

<p>bitcointalk, </p>

<p>bitcoin.stackexchange, </p>

<p>github issues page, </p>

<p>bitcoin-dev.</p>

<p>For commercial companies offering bitcoin client support see Stephen Gornick's answer. </p>
