How to make website load faster and cause less load on the webhosting server? Do you have any tips?

So far i found a few page speed analyzers that can advice on what to do to increase website speed:

2. (good advices on the bottom after test result)
3. - load times from different GEO locations

Examples actions to decrease website load time:

- optimize images to be as smallest in data size as possible - try these optimizers: ; ;
- reduce number of page elements. Example, use "CSS sprites" OR use so called "HTML maps" if you have static images in a row to combine it and assign them links (multiple links from one image) here are ImageMap generators: (click first corner, then click second corner and click New Area. repeat)
- Add images into so called data:uri (embed images into html code not needing to have image file)
- miniffy javascripts & css
- prevent javascript delaying load of webpage by setting async attribute to it, example: <script async src="my.js"> OR move javascript to the website footer OR embed small javascripts directly into the webpage code (see how)
- another ideas how to optimize site here

Add this to .htaccess file (it should instruct website visitor webbrowser to cache mentioned elements and dont request them from your server)
## Browser caching - Tell browser to cache and not download again ##
<IfModule mod_expires.c>
ExpiresActive On
ExpiresByType image/jpg "access 1 month"
ExpiresByType image/jpeg "access 1 month"
ExpiresByType image/gif "access 1 month"
ExpiresByType image/png "access 1 month"
ExpiresByType text/css "access 1 week"
ExpiresByType text/html "access 1 day"
ExpiresByType application/pdf "access 1 month"
ExpiresByType text/x-javascript "access 1 month"
ExpiresByType application/x-shockwave-flash "access 1 month"
ExpiresByType image/x-icon "access 1 month"
ExpiresDefault "access 1 month"
## Browser caching ##
Add this to .htaccess to compress content sent to website visitor (save datatransfer, cpu and serve site faster)
<IfModule mod_deflate.c>
AddOutputFilterByType DEFLATE text/text text/html text/plain text/xml text/css application/x-javascript application/javascript
Test whether your site output is compressed:

If having wordpress, or other CMS, search for "Cache plugin/mod" which can cache some dynamic elements of the webpage into static one decreasing load on server and time to serve content