I was searching through Internet to find set of tips which are recommended for desktop computer. In my case it is laptop, but I suppose that they should be similar.

This what I found is:

Processor type and features-->

1. Processor family <-set your family
2. Timer frequency <-1000 Hz
3. Maximum number of CPUs <- set number of your CPUs
4. Multi-core scheduler support (in case of multi core CPU's)
5. PAE (Physical Address Extension) Support (according to your needs)
6. Preemption Model (Preemptible Kernel (Low-Latency Desktop))-->Preemptible Kernel

This is what I found and use. Do you know any other generic optimisations for desktop computer?

You could get rid of file systems or device types that you are sure not to want to use. Actually everything boils down to your definition of generic. There is no such thing as a generic set of rules (one size that fits all). In a certain sense a kernel with all components compiled into it is more generic in terms of applicable in more situations. By specifiying something, like the options in your posting, you are making the setting more specific instead of generic.

Most often a desktop computer is a system where you can not always tell in advance how it will be used. Accounting or DTP or 3D-animation use desktop computers with quite different requirements. A DNS-server, on the other hand, is very well predictable in terms of resources needed.

Debian