There are many of option available in Microsoft Certification like you have to first decide which one you want to go first Web or Windows or others (options given below).
Link to Microsoft Certification Site : http://www.microsoft.com/learning/en/us/certification/cert-overview.aspx
Recommendation : (you can attend any one of below and you will achieve Microsoft Certified Technology Specialist (MCTS).
Exam 70-511 MCTS: Microsoft .NET Framework 4, Windows Applications
Exam 70-515 MCTS: Microsoft .NET Framework 4, Web Applications
Exam 70-513 MCTS: Microsoft .NET Framework 4, Service Communication Applications
Exam 70-516 MCTS: Microsoft .NET Framework 4, Data Access
Exam 70-506 MCTS: Microsoft Silverlight 4, Development
About preperation : Go with Microsoft Training kit, for example if you want to attend 70-511 then search for 70-511 Training kit in google and you will get the resources which you want for preperation.
How to apply, search for near by prometric center, visit it and register the date for exam. It is online objective test of around 2 hours and result will be given to you instantly after exam.
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