Its been a long time since I've had a good tip but I have an 'ard boyz inspired one!
Tired of you (or your opponent) loosing track of which unit is in which rhino? Tired of your opponents army being led by David Blaine? Me too.
Well here is your answer. Its simple, its efficient, and your opponent will love you for it.
While practicing for ard boyz I found myself really loosing track of what was where. When you have 12 chimeras full of various units, its pretty easy to do! So, I didn't want to be one of those players who's transports have magical webway portals between their transports. So my fix to that was to have some tags.
The tags need to be durable and easily identified. They're too easy for me to make to have to explain in detail how I did it, but basically, you can buy plasticard in strips. Next, buy some printer labels. Print out whatever you need to tag, cut it to stick on the strip and then cut the strip. Viola! Unit tags.
Another thing I noticed while play testing that many vehicles was that I just did not have enough status markers. So, same principle applies just with the words "STUNNED" or "IMMOBILIZED" instead. Gale force has some cool markers but it doesn't come with enough for a big vehicle army and why buy multiple copies at like $10 each when I could just make as many as I want for just under $5?
I can't recommend these enough. Even for people who only have a few transports, they're a huge help. I know a lot of people out there just put a model on their rhino, but I had 100% of my opponents I've played against since I started using them say they liked the markers and appreciated them. As well as being awesome for your opponent, they're great for yourself. (Here's the biggest reason to use them) They protect you from being accused of the unit your putting down not actually being in that vehicle.
Its kind of hard for my opponent to say "Oh, I thought that chimera was the one with the demo charge in it, and not that one your getting guys out of" when I have two tags on top of the chimera that say "Vets" and "Demo". I hate trying to do time travel with my opponent to go back a few turns and remind him of when I said "...and 165 (I number my chimeras for reference) here has the demo charge...." If I have the tags on I can just give him a look that says "I'm sorry you thought that." Its easier for your opponent to argue the point if all that's on top of the chimera is a model with a melta gun.
Its easy, its cheap, its convenient If you have any questions, feel free to post!