1. Ibirimo bike bya karubone, ubukonje bwiza no gusudira.
2. Icyuma-cyera cyane gifite ubuso buhanitse, kibereye ibicuruzwa bisaba ubuso buhanitse.
3. Ibikoresho byiza byubukanishi, cyane cyane ibintu bitangaje, birashobora kuzuza ibisabwa mumirima myinshi.
4. Kurwanya ruswa nziza, ibasha kurwanya ruswa ituruka mu kirere, amazi, amavuta, aside, alkali nibindi bitangazamakuru kurwego runaka.