Use symbols of round rectangle etc
Use effect --> convert to shape\
path - the same as those under object path
Effect --> warp - very useful for industrial design.
Distort and transform are the most useful. Free distort is like free transform in photoshop.
Preferences - scale stroke - go into -object --> path and outline stroke
Roughen - very abstract
Pucker and bloat - pucker changes anchor points
Gradient - can be radial or linear - this is good for the colour of the eye.
Remember for eyes, not to go too round - don't forget the eye lids!
To change colour of gradients, double click and change, decide how many tones you want to blend between. To get rid of a colour, just click and drag. Gradient sliders indicate the amount of colour.
If you want a highlight, use white in the middle and make it a sharp gradient
Blending modes - 2 shapes, select both - object --> blend --> make. This blends one shape to the other. This can be released in the same place. Can got to blend modes 0 go to smooth, can decide how many steps you want - more steps is smoother.