Start with your equipment
Check whether your tent and sleeping pad came with repair materials. Keep the appropriate instructions with them. Adhesives and patches vary by material, so a generic tape roll is not a reliable answer to every problem. Add spare pegs and cord that suit your normal setup.
Keep it small and familiar
A compact kit might contain compatible patches, spare cord, pegs and the tools needed for your equipment. Store sharp tools safely and check site or travel restrictions where relevant. Learn the repair sequence at home so you are not trying to read tiny instructions in the rain.
Use the linked knot demonstrations for the tying sequence.
Treat a temporary fix as temporary
A field repair can make a trip more comfortable, but inspect and test the equipment properly afterwards. Do not improvise repairs to leaking fuel systems, damaged electrical equipment or anything supporting a person’s weight. Stop using equipment when you cannot establish that it is safe.