How to fix 404 error on my website

1. Title - Citadel of Thoughts
2. URL - <!-- m --><a class="postlink" href="http://www.citadelofthoughts.com">http://www.citadelofthoughts.com</a><!-- m -->
3. Category - Lifestyle/Creative/Personal
4. Site Type - (For example : Forum / Blog / Site) BLOG
5. Description - This is my personal blog where I write about different things regarding different topics.

I've had this blog for over a year but I've only recently started to take it seriously and post regularly. I am open to all constructive criticism please. Thanks for your help.

Sharon

1. Title - Languavel
2. URL - <!-- m --><a class="postlink" href="http://forum.languavel.net">http://forum.languavel.net</a><!-- m -->
3. Category - Education/Travel
4. Site Type - (For example : Forum / Blog / Site) FORUM
5. Description - Languavel was established to provide a central location for all language and travel enthusiasts and share their thoughts and opinions about topics we are all passionate about. We strive to improve our community every day. Any suggestions would be greatly appreciated!

I've recently started seriously getting into my blog and am constantly trying to find ways to improve it. I think this place can really help me out. I look forward to being part of this community.

Thanks.

Hi Friends This is my website <!-- m --><a class="postlink" href="http://www.homesulike.com/">http://www.homesulike.com/</a><!-- m --> . I already do the off page seo. I get alexa rank decreasing, but i didn't get alexa backlinks. Please suggest me.

I have a query regarding links from forum and blog comments. Did they have any value at all? or they can just hurt my rankings.

I want a service which can optimize my app for maximum exposure and conversions. If anybody will refer me to any then it will be very helpful.

How to know my strength and weaknesses in blogging? I mean which niche to choose and which to not.

I am literally confused right now about what to do. I can a get a backlink from another language site (other than English) and it has high DA/PA. Will it be helping my site to rank? or, can it hurt my site?

It is from a while I am seeing that inbound links are regularly disappearing. I can see it in my Google Webmasters tools account. Why it is happening? Can anybody please explain, I am really worried about right now.