When the pattern calls for "Bind off loosely", try using a needle one to two sizes larger to complete the bind off! Works great for me!
Store yarn by content, ie: Cottons, Acrylics, Wools, etc.. in separate storage boxes. Label each box accordingly.
Always keep the yarn wrapper for smaller quantities. Place smaller, balled yarn inside a sealable plastic bag and throw in the wrapper so you'll know the details for future use or trading.
Invest in a bodkin that has a hook at one end and ball at the other for picking up dropped stitches and beading. Very useful tool!