Binarynova's Realm  Cubing
2x2 ("Pocket Cube")
Case #1 R' U' R U' R' U2 R 
Case #2 L U L' U L U2 L' 
Case #3 R2 U2 R U2 R2 
Case #4 F [R U R' U'] 
Case #5 F [R U R' U'] F' 
Case #6 [R U R' U'] [R' F R F'] 
Case #7 [F R U' R' U' R U R' F'] 
After performing the above step, if one side is solved orient that side to the right (as seen below) then perform a U' before using the following algorithm. If opposite corners are matched do the algorithm to get a matching side, then perform a U' followed by the algorithm again.
(If side solved.) U', then: L' U R' D2 R U' R' D2 R2 
(If no side solved.) L' U R' D2 R U' R' D2 R2, then: U', then:L' U R' D2 R U' R' D2 R2 
Improving my 3x3
1. White Cross 

2. Intuitive F2L 

3a. 2Look OLL Cross 

Dot: F (R U R' U') F' f (R U R' U') f' 
L shape (front right corner): f (R U R' U') f' 
Line (lefttoright): F (R U R' U') F' 
3b. 2Look OLL Corners 

0 Corners H : F 3x(R U R' U') F' Pi : R U2 (R2 U' R2 U' R2) U2 R 
1 Corner Sune : R U R' U R U2 R' Antisune : L' U' L U' L' U2 L 
2 Corners L : x (R' U R D') (R' U' R D) [x means face the bottom] T : x (L U R' U') (L' U R U') [x means face the bottom] U : R2 D R' U2 R D' R' U2 R' 
4a. 2Look PLL Corners 

Diagonal Corner Swap: (F R U' R' U' R U R' F') (R U R' U' R' F R F') 
Adjacent Corner Swap: (R U R' U' R' F) R2 (U' R' U' R U R' F') 

4b. 2Look PLL Edges 

3Edges: 1 (RtoL): R U' R U R U R U' R' U' R2 2 (LtoR): L' U L' U' L' U' L' U L U L2 
4Edges: 1 (opposites): M2 U' M2 U2 M2 U' M2 2 (adjacent): M' U' M2 U' M2 U' M' U2 M2 (M' goes upwards) 
Megaminx
Solve all but the last layer "intuitively" using simple movements to move sides and corners and then slot them into place. Great video teaching this approach to the Megaminx: YouTube.
Last layer algorithms (if using the alt version of the corner orientation, this is just like solving the last layer on the 3x3):
 Orient star pieces: F R U  R' U' F' (same as beginner 3x3)
 Permute star pieces: R U R' U R U' U' R (similar to beginner 3x3)
 Orient corners: U R 2U' L' 2U R' 2U' L U
 Orient corners (alt, where L is the backleft face): U R U' L' U R' U' L (same as beginner 3x3)
 Permute corners: R' D' R D (same as beginner 3x3)
Megaminx info from the above linked YouTube video.