This article is an extension of my previous article http://www.c-sharpcorner.com/UploadFile/Mahadesh/8886/ on Silverlight Slide In Transition Effect using Visual State Manager.

Follow exactly the same steps as in the previous article.

Now lets get into the xaml code: The xaml should now look like :
<!-- Visual State Created -->
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="PageTrans">
<VisualStateGroup.Transitions>
<VisualTransition GeneratedDuration="0:0:1">

<ei:ExtendedVisualStateManager.TransitionEffect>
<ee:SlideInTransitionEffect/>
</ei:ExtendedVisualStateManager.TransitionEffect>

<VisualTransition.GeneratedEasingFunction>
<CubicEase EasingMode="EaseInOut"/>
</VisualTransition.GeneratedEasingFunction>

</VisualTransition>
</VisualStateGroup.Transitions>

<VisualState x:Name="Start"/>
<VisualState x:Name="New"/>

</VisualStateGroup>

</VisualStateManager.VisualStateGroups>
<VisualStateManager.CustomVisualStateManager>

<ei:ExtendedVisualStateManager/>

</VisualStateManager.CustomVisualStateManager>
<!-- Visual State End-->

Note that Blend SDK not only offers Slide In Effect but there are more as well.

Please find the list of Effects offered by Blend 4 sdk.

Effects List in Blend4

Just replace the Slide In Effect with each one and run them one by one.

Excellent transition Effects without doing anything great. Blend is Great.