Curves:

• A curve in viewport  can be double clicked to open in Curve Maker for further edits !!
• Curve maker can make alpha shapes for texturing (also you have bool operations in it !!).

Unwrapping:

• Unwrap button when used for selected faces with no seams at all it will act as iron/flatten and directly unwrap your selection.
• Keep important areas of your model always big in uv (texel density) to have the best resolution in rendering inside game.

Texturing:

• Fill it, bakes (seam, hard edge, direction bake) >> they all depend on your paint brush parameters so always keep an eye on it
• Fill it works on masked area and selected layer altogether so keep an eye to your limits when filling.
• Fill it also limits to selected faces in edit mode directly
• If paint tab is open: Just press 'e' to erase mode for any selected brush. 
• If paint tab is open:  Just press F to stamp your brush directly to selected edges in edit mode
• Spicy generators (clouds, noise, metal....etc) can really be used one after another to create your own textures.
• use a patterned alpha with fill it (on masked area or layer) to make your texturing cool.
• For pixel art and PSX-Art lovers we have two options: either you use pixel brush to draw pixelated strokes, or you draw normally then use layer effect "pixelated" which makes all magic for you ! you can also export texture as pixelated and lower resolution with no smooth filtering as final option.
• Seams bake works based on your unwrap islands (island edges), while hard angle bake works on angle limit you choose as your max limit.
• Direction Bake is a great tool if you want to add snow on top of object (like house) , or want to make down dirt for a barrel or something, all limited to your imagination only.