This one is a drag to make. Very bad documentation and even less examples. Anyway what you need to do is go to module folder of simplenews and copy from subfolder "theme" files like simplenews-newsletter-body.tpl.php, simplenews-newsletter-footer.tpl.php to your default theme folder and edit them there. And what you need to do is make most of the html.

Sometimes your drupal DB will have problems, and it will cause slow queries, especially when having many nodes. Log to you phpMyAdmin and select all tables in DB and click optimize or repair, this could fix many problems and make your site run smooth again.

You hate it when webform block redirects to webform page and your visitor loses the page he/she was on when submiting form. Well you can sort this out.

This is the code you put in your template when overriding submitted by text, there is also a module that helps do some of this things http://drupal.org/project/submitted_by
also take a note that when you want to translate you need to use setting.php technique.

You want to translate a block but it is not showing, there is a bit hidden setting for this to be enabled, catch it here. Adminster -> Site configuration -> Languages -> Configure - "String translation Tab"

If you are creating some actions for VBO module, so you can do some operations on fields over view. You would probably first check what is there to fetch in object you are using. So for example to get a listing of user objects variables you make this submodule

User terms module is best module for user taxonomy terms you can have in drupal 6. Mostly it works as it should and there is no lack of functionality. However, if you want to bulk change user terms, you are out of luck, VBO doesnt work with it so you have to do this manually.

There is a good module imageache external that creates variants of images from external links, it's in sort of API mode as you have to code to use it. Also for purpose of FBSMP module I am using with it and better SEO, I changed how it works and made it possible to have image filename correspond to status which is third parametar in

I just had a stupid problem, had a drupal installation in subfolder and there is much info how to solve this on the official clean-url page, but this problem isn't there. Sometimes when you copy files to windows and then copy it back to linux .htaccess will lose it's dot and then clean-urls and something else might not work but you won't notice it because you don't look for it.

Views Send is a great module for mass sending of mails/messages, kind of like newsletter but you can use whole power of views and VBO module, which gives you great flexibility.