Going to be a bit skint, with lodgers going. Went through my Amazon saved items and deleted almost everything, even smoke alarms. The oldest ones I have are 8 years old, but I have about 13 alarms in the house, and some are fairly new. All the batteries were changed 2 years ago.
Learned a new knot. Pretty basic. I do have a note for this, so I've learned it in the past and forgot it. There are several variations. Wiki says this one is the most secure, but could be hard to undo after loading. It's a sliding knot to tighten a rope eg guy rope, tarp etc.
MIDSHIPMAN' HITCH
Pass the working end around the anchor object. Bring it back alongside of the standing part and make a half-hitch around the standing part.
Continue by passing the working end over the working part, around the standing part again and back through the loop formed in the first step. Make sure this second wrap tucks in between the first wrap and the working part of the line on the inside of the loop. This detail gives this version its additional security.
Complete with a half-hitch outside the loop, made in the same direction as the first two wraps, as for a clove hitch.
Dress by snugging the hitch firmly around the standing part. Load slowly and adjust as necessary.

NB. The above in wiki is under Taut-line Hitch, which is a variation where the second loop is on the outside, above the first, different to the bit in italics above.