Tips and technical articles are always in huge demand, if you have some information that is interesting or has some practical test advice please let us know and we will add it here.
Technical Information
Kindly supplied by VXI Technology Ltd. Fundamentals of Dynamic Signal Analysis
http://www.vxitech.com/CATALOG/Technotes/Technote12.pdf
Kindly supplied by VXI Technology Ltd. Signal Analysis Reference Guide
http://www.vxitech.com/CATALOG/Technotes/Technote13.pdf
A Variety of Technical articles about the use of accels and other vibration related topics
http://www.endevco.com/resources/TechPapers.aspx
Understanding Damping Techniques for Noise and Vibration Control - E A R Speciality Composites
http://www.earsc.com/pdfs/engineering/understandingdamping.pdf
Shock Control for Portable Electronics - E A R Speciality Composites
http://www.earsc.com/pdfs/Dampingeffects1-inHDD.pdf
The Four-Fold Method of Noise and Vibration Control - E A R Speciality Composites
http://www.earsc.com/pdfs/engineering/4foldWP.pdf
A Brief Survey of Vehicle Seat Test Specifications - TEAM Corporation
http://www.teamcorporation.co.uk/documents/app_notes/Vehicle%20Seat%20Test%20Standards.pdf
Pyroshock Explained - PCB Piezotronics
http://www.pcb.com/techsupport/docs/vib/VIB_TN_23_0406.pdf
The Shock Spectrum - what is it - PCB Piezotronics
http://www.pcb.com/techsupport/docs/vib/VIB_TN_19_accel_shock_spectrum_1005.pdf
Source Identification Using Acoustic Array Techniques
http://www.pcb.com/techsupport/docs/acoustic/acoustic_array_technique_(SAE95).pdf
BOOKS:

Mechanical Vibration & Shock. Volume 1: Sinusoidal Vibration - Christian Lalanne ISBN: 1903996031

Mechanical Vibration & Shock. Volume 2: Mechanical Shock - Christian Lalanne ISBN: 190339804X

Mechanical Vibration & Shock. Volume 3: Random Vibration - Christian Lalanne ISBN: 1903398058

Mechanical Vibration & Shock. Volume 4: Fatigue Damage - Christian Lalanne ISBN: 1903398066

Mechanical Vibration & Shock. Volume 5: Specification Development - Christian Lalanne ISBN: 1903398074

Harris' Shock and Vibration Handbook - Cyril M Harris ISBN: 0071370811
VibSlideRule is a great tool to help visualise the relationships that apply and includes units conversions, supplied by m+p international UK Ltd http://www.mpihome.com/downl/vibsliderule.exe
Shear Mode Accelerometers vs Compression mode
Article