Bowline: a fixed loop
A bowline makes a loop that does not slide smaller under a steady load. It can be handy for an ordinary camp tie-off. It is not a substitute for checking the whole setup: slippery cord, changing tension and poor dressing can affect security. Practise with a clear animation, then inspect the finished knot from both sides.
Adjustable hitch: a tent guyline
An adjustable hitch lets you change the tension on a guyline without retying everything. Its grip depends on the cord and conditions. Use the tent’s supplied adjusters when they work well, and practise a knot as a useful backup. Mark guylines so they are easier to notice at dusk.
Use the linked knot demonstrations for the tying sequence.
Sheet bend: joining cord
A sheet bend is a useful knot to learn for joining suitable cord, including cords of different thicknesses. Orientation matters, so use a reliable step-by-step demonstration and check the finished shape. Leave adequate tails and test gently before ordinary camp use.
Sources & further reading
Read the original guidance for more detail. Product reviews and demonstrations belong to their publishers.