Press the + sign. Press Shortcut. Press Direct Dial (for calls) or Direct Message (for texts). choose the contact you want. Voila. (Obviously, make sure you have room on your screen for it first.)
If you look at
this post of mine, you can see that I have three picture icons on my home screen (first picture). Those are to text my husband and two sons (see the little messaging icon?). The third picture shows the same people, with a phone icon. Those are shortcuts for calling them.
Push one button and you're connected. However, the first time you use them, it may ask you which number you want to call/text, but after that, it remembers (as long as you set it as default).
Long press on a blank portion of your home screen. Select shortcut. Select direct dial. Choose the contact you want. Pay me.

Grrr... I hate you and your lack of verbosity.
