Step 1: The First Part
Your first goal is to reveal a good lump of 'safe' squares with just a few clicks, depending on the difficulty you are on. If things got good (see picture 1), proceed to step 2.
But I bet you won't be getting the same good lump the 2nd time around, so you'll still be reading the following procedures. Here comes your patience. Yes, patience is a virtue. And you need it for you to win any games out there, including Minesweeper. If things didn't get good (see picture 2), restart the game and repeat clicking until you get that good lump of squares.
Luck is when you get that good lump.
Step 2: Here Goes Your Logic...
A square, unless touching a side/corner, has 8 other squares neighborng it, therefore:
If you click the square and see a '1' in it, it means that one of the other 8 squares around it contains the bomb;
If you click the square and see a '2' in it, it means that two of the other squares around it contains bombs; and so on.
If you click the square and see the mine in it, you have no choice but to repeat the game from the start.
Step 3: Number Combos
Example (see Picture 1): All the five '1s' sitting on the bottom-right corner of the Minesweeper box. Based on my observation, you can only put the flag (double-right click) on one of the 4 blank squares, since putting the flag on the other 3 will contradict to the rest of the '1's in that area. So, in order to fill in the problem, I put the flag right in the square that will make the logic, of all of the five '1's there, true.
Picture 2 shows a basic number combo.
Tip: If you are already sure that the n squares you flagged around a numbered square contain the bomb, feel free to click the remaining squares. This might contain a blank square or another numbered one.
Step 4: Voila! the Smiley Had Its Shades On!
Tip: Some Minesweeper tricks.
Once you see a '1' situated in a corner, as shown on image notes, immediately flag the square diagonally adjacent to it.
Any other number greater than '1' cannot be situated in a corner.
A frame of '1's always happens (see bottom-right); the three blank squares are also '1's and at the center is the bomb.
Two '2's situated diagonally against each other often share the two same bombs.
The higher the number, the greater amount of bombs are placed around it. This may be easy, if and only if you carefully observe other numbers situated near it, or that the number itself is '8'.