Make your site in responsive design and use keywords that can be found easily. But I don't know if these tips are "the best" ideas. But it worked for me.

For mobile friendly use Google Tool

[DELETED]

for onpage ive been using mysiteauditor, for offpage and competitors analysis im using majestic,moz,ahrefs

For seo, use seositecheckup.com

https://developers.google.com/speed/pagespeed/insights/ I use quite a lot

If you are using wordpress there are seo plugins that will tell you what you need to fix. Off the top of my head i don't remember the plugin name but a quick google search should work