Not only do you have the ability to edit your photos in Google Picasa, but you may also email your pictures to your friends or just about anyone directly from the program, which makes things a lot easier than going into a separate email program and sending them manually. First you must open the Picasa program. Once you have opened it you will see all of your images in your database. Please move onto the next step.
Unlike all of the other tutorials, you are going to be selecting more than one image, unless you only want one image. You will see a blue rectangle around the image(s) you want to choose, this is a sign that will let you know that you have selected them. Once you have done so, please move onto the next step.
Underneath all of your images and such, you will see a toolbar that has buttons named Web Album, Email, Print, and Order Prints. You are going to hit the Email button. Once you have done so a new screen or window will pop up. You will have the opportunity to send your images through any Email program you decide to choose, mainly ones that you have on your computer. Picasa actually has a built in Email program, so you could make an account through that if you'd like.
If you'd like to remember your Email account, you may do so by clicking the "Remember This Setting" button, this will make things a lot easier if you only have one Email account. Many people enjoy using Outlook, so I would recommend using that one. Basically all you need to do now is create a message if you'd like and send the photo's or images and that's it. Enjoy!