I just finished the VSP (vmware sales professional) and VTSP (vmware technical sales professional) and whereas VSP bored the hell out of me, the VTSP is VERY interesting if you pursuing the VCP.
The Technical Sales online course is a VERY good start and WILL help you to study for the VCP. For example, this course went into the details I was missing on courses such as the Trainsignal one : Distributed Switches and Update Manager, vApps and other. Each modul has also a small test and some questions are quite related to the VCP ones (don't even ask for details).
In order to sign up for these courses you must be signed up as a partner
VMware Partner Central Sign-In
If your company is not a partner yet, ask your manager to sign up for the access. This is free anyway (unless you pursue the partnership and signup for certain plans). You can sign up for yourself and "attach" your account to any other company I think as well .. Have a read .. the free VTSP course is well worth it in my opinnion (about 7 - 10 hours online) ...