To Schedule gmail messages to be sent or returned at a later date

To Schedule gmail messages to be sent or returned at a later date- Install Add-on called "Boomerang for Gmail"
After installation the Boomerang icon will appear whenever you click the compose in your gmail. It allows you to schedule to the date and time when you want to send your mail.

To Capture an Image of a Webpage or select the part you want and save it

It may sound easy but many websites does not  allows you to download or save their pictures or text and if the webmaster is an experienced programmer , the moment you log in the website the copy and save function is totally disabled.
Yup! There are many ways you can go about with this but please be reminded that downloading copyright material is illegal !!!
OK! Here is how you can copy those images : Install the add-on called "Abduction". I would assumed you use Firefox :
1. go to https://addons.mozilla.org/
2.Search for  " Abduction"
3. Move you pointer to the Add-on then click on "Add to Firefox"
That's it! It will add a command "Save Page as" whenever you right-click your mouse.