Ledger Tile

DIY TIP #2 - White or grey mortar?
You've read my tip #1 and you're at the home depot and now you can't decide between grey and white mortar. Does it make a difference?
YES. Always use white unless you are tiling with a dark/grey porcelain or stone tile. Do not use grey mortar for glass (transparent) and do not use grey for lighter/sh*te stone tile (porous).
Questions?
Please comment!

I know there are some considering DIY and I want to equip them the best I can should they go that route so I will be starting a series of small posts, starting with this. If any DIYers have any questions at all, feel free to comment and I will answer in the post so everyone can see.
DIY TIP #1
Pre-mixed mortar, pre-mixed grout. When can you use either?
Pre-mixed mortar (mastic): small ceramics and ceramic/porcelain mosaics. Otherwise, do not use pre-mixed mortar (bigger porcelain, glass, stone). Do NOT use on floors or showers, EVER.
Pre-mixed grout: just never use. The convenience of it being mixed pales in comparison to the frustration you will experience using it and there is a very high risk of poor results for the inexperienced.