Changing the Icon
You can change the default icon icon.png with yours. Transparent .png is recommended, 16x16px size.

Changing the Language
First of all, you should have some of the latest versions of “Life is Simple”. There must be a folder lang with some .po and .mo (the important ones) files inside. Languages are supported since v1.3.1.
Okay, here we go. Open wp-config.php and go to the following line:
define ('WPLANG', '');
Now type between the second apostrophes. Currently supported languages are Bulgarian (bg_BG), German (de_DE), French Canadian (fr_CA), and Persian (fa_IR). So if you want to use the theme in German just type as follows:
define ('WPLANG', 'de_DE');
Or this one for the Bulgarian translation:
define ('WPLANG', 'bg_BG');
Or French:
define ('WPLANG', 'fr_CA');
And for the Persian:
define ('WPLANG', 'fa_IR');
Also, please notice, if you want a full translation, only translating the theme is not enough. You should have a localized version of the entire WordPress, i.e. download WP in your language.

What about Comments on Pages?
By default pages don’t supports comment, but here comments are possible on pages. If you don’t want comments on you pages, don’t forget to uncheck “Allow Comments” while posting.
If you want to remove comments from pages permanently, open page.php and delete <?php comments_template(); ?>.
Look at the bottom, by default we have:
</div><!-- #post-id -->
<?php comments_template(); ?>
</div><!-- #content -->

After the deletion it should looks like:
</div><!-- #post-id -->
</div><!-- #content -->

Images and Sizes
Go to “Settings” -> “Media” and make some changes.
“Medium size” – set “Max Width” to 800 or 850. The theme is optimized for these sizes. For “Max Height” 0 (zero) is fine, unless you upload an extremely large images.
“Large size” – at least the same sizes, or even bigger.
“Thumbnail size” is totally your choice. If width=220, you can have 3 thumbs in one line. If 350, you can have 2 thumbs one next to another.

More Settings
I suggest unchecking the “Break comments into pages” box in “Settings” -> “Discussion”.

How to remove the “Meta” widget in the sidebar?
1. Open sidebar.php.
2. Find the following paragraph:

<li><?php _e(‘<span>Meta</span>’, ‘life-is-simple’); ?>
<?php wp_register(); ?>
<li><?php wp_loginout(); ?></li>
<li><a href=”<?php bloginfo(‘rss2_url’); ? rel=”nofollow”>” title=”<?php
_e(‘Syndicate this site using RSS’, ‘life-is-simple’); ?>”><?php
_e(‘RSS Feed’, ‘life-is-simple’); ?></a></li>
<li><a href=”<?php bloginfo(‘comments_rss2_url’); ? rel=”nofollow”>” title=”<?php
_e(‘The latest comments to all posts in RSS’, ‘life-is-simple’);
?>”><?php _e(‘Comments RSS’, ‘life-is-simple’); ?></a></li>
<?php wp_meta(); ?>

3. Delete the whole paragraph and save the file. Done!

License your content! But don’t restrict too much. Go to Creative Commons and pick a license. Then open footer.php (or sidebar.php or wherever you want) and mention it there. For example, take a look to my footer.