DblTap1,
I applied for VA benefits about a year before retirement. The DAV (Disabled American Vets) held a mass briefing and had counselors on hand to go through medical records and fill out claims forms, and I took advantage.
The VA was very helpful while I was still AD - set me up with vocational rehab counselor months before I retired, etc.
Unfortunately, after retirement they were not quite so helpful.
1) Make sure you keep a copy of every medical record, lab test, x-ray etc. and also any correspondence to or from the VA. They may do a good job on your claims but they may not. If they don't, your good record keeping now could make all the difference.
2) All correspondence should be sent registered mail with return receipt! If they deny receiving something from you, it can cost you. The only way you can prove it was sent & received is with the signed & dated receipt. Keep the signed & dated receipt with the copy of what you sent and the cash register receipt from the post office receipt from when you paid to mail it.
3) Similarly, if you hand deliver anything, always have a second copy on hand and make sure they date stamp receipt on EACH PAGE of the copy you keep. They might give you dirty looks when you request this, but INSIST!
4) Buddy Statements - Statements from people who know about your injuries, how they were acquired, how long you've suffered from them, how they've affected your quality of life and ability to support yourself, etc.
No one told me how important these statements could be until I found my way to this forum. I sure wish they had. Buddy statements (and even your own statement to go along with your claim and medical records) can tip the scales in your favor. I can't tell you how many BVA decisions I've read where the statements from friends and family have made the difference between a higher or lower rating or even service connection.
I'm sure there are alot more things that it's really important for you to know that I just can't think of right off the bat. But there are also many helpful (and frankly more knowledgeable) people here at HADIT that will chime in and fill in the gaps.
best of luck