HTML for dummies

okay some of these took me forever to learn so just want to make it easier for others
bold = < b > text < /b >
italic = < e m >text < /em >
strike through = < s > text< /s >
Aba's new blog =
< ahref="URL"> Text < /a >
YouTube(in a new window) =
< ahref="URL">text< /a >

(picture as a link) =

< ahref="URL"> < src=" picture "> < /a >
bigger** than surrounding text =

< font="+3">text < /font >
smaller** than surrounding text =

< font="-3">text< /font >
line break = < d i v >
** can not be done using blogger, automatically destroys the coding, have to use their tool

a URL is a web address starting with Http://
Remove all spaces in codes , just like you do in URL's

Please feel free to leave any codes you think would be helpful in the comments. Thank you!