Welcome to the forums and best thing that you can do to improve is practice of course. :) Check the game that you are running page on this site look for helpful resources such as guides and ask questions on the games forums as well. Watch other pro runs on video hosting sites such as youtube or even on twitch. Conduct thorough research on the game in question and you are looking for glitchless? So I guess that means ripping the game apart and looking for new glitches is out of the question. Hey good luck with your speedruns. :)