Keep the header small, the largest part of the viewport should be reserved for the content.
    Only put absolutely necessary things in it (do you really need your logo there?).
    Make sure the header contrasts with the content part well enough. It's much harder to do that with only space (which usually does work for non-sticky headings). Using a darker background color for the sticky header works fine.
    Sticky headers hardly ever work when viewing websites on small screen devices like phones (web applications are something else).
    Minimize flashy animations when the user scrolls down and the menu 'snaps', it only disrupts the focus on the content and has hardly any use.

	
	Be careful not to use too much screen real estate. If the user is scrolling down, then they are likely interested in the content. I like the idea of decreasing the size of the header as the user scrolls down. If you have a large logo, you can use a smaller version as the user scrolls and shrink the header a bit. Also make sure that page scrolling works if the user is using the space bar or scroll bar; when using those scrolling methods, the last one or two lines of text are typically displayed at the top of the page.

The most important best practice is something you already should be doing: Make the header useful and understandable. If the header is useless to begin with, then the sticky header will just be an annoyance.

Sticky elements can also be used to draw attention to CTAs (calls to action) that can appear on the far left or right if the user scrolls down (again, make sure not to interfere with content). We have found success using sticky elements for contact us, help desk, and "back to top" links.


When users are reading scrolling content such as a feed or an article, its easy to get tunnel vision and ignore the navigation. When they finish consuming content or come out of that tunnel, it can be frustrating or disorienting to no longer have access to the main actions on the site because you were reading or engrossed in the content.

also lieber menü am unteren ende

collapsing menu to menu burger button 

nice tl:dr inbetween article http://www.particletree.com/features/visualizing-fittss-law/