Here are some of my opinions on naming conventions.  I try to follow the most used conventions and formats.

When naming objects, variables, scripts, and resources; try your hardest to give them names that mean something to you.  If the names of things don't represent what they do then no one will know what they are.  Of course you will, but that's only for the short week that you remember   scissorLift   is an object that handles menu items.  A better name might be   obj_menuHandler

Separate multiple words by making the first letter of every word a capitol.  Skip capitalizing the first letter of the first word and words that follow a _.  Here is an example:

playerPoints
spr_timeLeftGUI  <---  I broke a rule here because there was an acronym
spr_tireMark
obj_tankTurret
MENU_LOCATION  <---I broke the rules again because this variable is a constant

Use prefixes to denote the data type.  I like to use:

• obj_  for objects

• spr_  for sprites

• scr_  for scripts

• snd_  for sounds

• tml_  for time lines

• pth_  for paths

Use all caps for variables that do not change;  These are called constants
Since were on the subject of constants, never use "mystery" numbers.  Make a variable for every number you use in your code.  If your still unsure by what I mean look at this:

if updateMenuLocations = 1
{
    obj_menuRoot.x = 120
    obj_menuRoot.y = 200
}

This is bad.  Instead of "mystery" numbers like 120 and 200, use constants.
The following code is much better.

if updateMenuLocations = 1
{
    obj_menuRoot.x = MENU_LOCATIONS[0,0]
    obj_menuRoot.y = MENU_LOCATIONS[0,1]
}

MENU_LOCATIONS is a 2d array for all menu locations.  If it was a global variable, all the menus in game would be located in the same position.  All directed by a single variable.  Also, if you want to change the location of the menus, you simply change one variable and your done.  Or, you can give the user the ability to customize the menu systems.  You couldn't do that if you used mystery numbers.

Last but not least is a little theory of mine that I've yet to test.  I'm playing around with the idea that it might be good to name large or important objects with all capital letters (Just like constants).