For the main riff, use a flamenco-style technique (like Les Claypool uses), or a thumbpick. You can use a regular pick, but either of the aforementioned techniques will get you closer to the sound of the song. For the bridge, just use your fingers. Intro/Main Riff: G|----|-7-7--7-7-7-7--7-7--7-7-7-xx-7--| D|---4|-5-5--4-5-5-4--x-x--x-----xx-4--| A|-5--|---------------x-x--x-5-5-------| E|----|---------------7-7--7-----------| Bridge: G|-----------------7~--2-4-------------4~--7~--2-4-----------------| D|---------0-2-5~--5~--------------0-2-5~--5~----------------------| A|-3~--3~-------------------3~--3~---------------------------------| E|-----------------------------------------------------------------| Last rep on bridge: G|------------4~--7~--2-4-----------------| D|--------0-2-5~--5~-----4----------------| A|-3~--3~---------------------------------| E|----------------------------------------| back into main riff