You need not install special gadgets or software's to increase your machines performance just check Do's and Don'ts given below.If you have any doubts just comment below.
Don'ts:
-Do not install unwanted softwares.
-Do not install two anti-virus or spyware because people think that installing two antivirus will completely prevent the system but actually it leads to system clash as both perform the same task.
-Remove unwanted startup applications because removing it will reduce the startup time(after login in).
-Do not install themes HD themes as they consume more memory and reduce performance.
-Do not install transformation packs.
-Do not run more applications at a time i.e i mean more memory consuming applications.
-Do no restart your machine often because it decreases processor life.
-Do no format HDD often,because removes some sectors each time i.e decreases memory.
-Do not run PC in high temperature areas.
Do's:
-Keep system up to date.
-Keep anti-virus or spyware up to date.
-Have RAM memory corresponding to HDD capacity,because if you have low memory with high HDD capacity will take more time for opening folders.
-Do not restart PC for hung just leave for a while and then try task manager and end process,if it doesn't works then finally RESTART.
-Run a scan when you plug-in a USB drive.
-Have appropriate cooling system.
Note:TheseDo's and Don'ts are fully based on my opinion from my experience.If you find any mistakes in this article comment below,so that it wont happen in future articles.