1. Disable visual effects. Go to Control Panel -> system -> advanced system settings -> visual settings and apply like this:
The last ones are also selected. Now your windows still looks fine and peek option is allowed.
2. Disable transparency from personalization menu. You can also remove play windows start sound from the sound options to speed up things a little bit
3. Disable unwanted services. Type services.msc into start menu, if you dont use windows search very often look for windows search and disable it
4. Select High performance power plan.
These are the things I like to do. You can also use faster internet browser like Chrome, use lighter antivirus software like Avast and remove password from your account to save up few seconds if no one else use the computer. Also upgrading hardware is the biggest thing. Double your RAM memory, change to SSD hard drive etc.